Health Insurance Type and Outpatient Specialist Care Among Children With Asthma.

Importance: Although children with asthma are often successfully treated by primary care clinicians, outpatient specialist care is recommended for those with poorly controlled disease. Little is known about differences in specialist use for asthma among children with Medicaid vs private insurance. Objective: To examine differences among children with asthma regarding receipt of asthma specialist care by insurance type. Design, Setting, and Participants: In this cross-sectional study using data from the Massachusetts All Payer Claims Database (APCD) between 2014 to 2020, children with asthma were identified and differences in receipt of outpatient specialist care by whether their insurance was public (Medicaid and the Children's Health Insurance Program) or private were examined. Eligible participants included children with asthma in 2015 to 2020 aged 2 to 17 years. Data analysis was conducted from January 2023 to April 2024. Exposure: Medicaid vs private insurance. Main Outcomes and Measures: The primary outcome was receipt of specialist care (any outpatient visit with a pulmonology, allergy and immunology, or otolaryngology physician). Multivariable logistic regression models estimated differences in receipt of specialist care by insurance type accounting for child and area characteristics including demographics, health status, persistent asthma, calendar year, and zip code characteristics. Additional analyses examined if the associations of specialist care with insurance type varied by asthma persistence and severity, and whether associations varied over time. Results: Among 198 101 unique children, there were 432 455 child-year observations (186 296 female [43.1%] and 246 159 male [56.9%]; 211 269 aged 5 to 11 years [48.9%]; 82 108 [19.0%] with persistent asthma) including 286 408 (66.2%) that were Medicaid insured and 146 047 (33.8%) that were privately insured. Although persistent asthma was more common among child-year observations with Medicaid vs private insurance (57 381 [20.0%] vs 24 727 [16.9%]), children with Medicaid were less likely to receive specialist care. Overall, 64 239 child-year observations (14.9%) received specialist care, with substantially lower rates for children with Medicaid vs private insurance (34 093 child-year observations [11.9%] vs 30 146 child-year observations [20.6%]). Regression-based estimates confirmed these disparities; children with Medicaid had 55% lower odds of receiving specialist care (adjusted odds ratio, 0.45; 95% CI, 0.43 to 0.47) and a regression-adjusted 9.7 percentage point (95% CI, -10.4 percentage points to -9.1 percentage points) lower rate of receipt of specialist care. Compared with children with private insurance, there was an additional 3.2 percentage point (95% CI, 2.0 percentage points to 4.4 percentage points) deficit for children with Medicaid with persistent asthma. Conclusions and Relevance: In this cross-sectional study, children with Medicaid were less likely to receive specialist care, with the largest gaps among those with persistent asthma. These findings suggest that closing this care gap may be one approach to addressing ongoing disparities in asthma outcomes.

Differences in Health Care Utilization for Asthma by Children with Medicaid versus Private Insurance.

Asthma is the most common chronic disease in children, disproportionately affects families with lower incomes, and is a leading reason for acute care visits and hospitalizations. This retrospective cohort study used the Massachusetts All Payer Claims Database (2014-2018) to examine differences in acute care utilization and quality of care for asthma between Medicaid- and privately insured children in Massachusetts. Outcomes included acute care use (emergency department [ED] or hospitalization), ED visits with asthma, routine asthma visits, and filled prescriptions for asthma medications. Multivariable logistic regression was used to account for differences in demographics, ZIP codes, health status, and asthma severity. Overall, 10.0% of Medicaid-insured children and 5.6% of privately insured were classified as having asthma. Among 317,596 child-year observations for children with asthma, 64.4% were insured by Medicaid. Medicaid-insured children had higher rates of any acute care use (50.4% vs. 30.0%) and ED visits with an asthma diagnosis (27.2% vs. 13.3%) compared to privately insured children. Only 65.4% of Medicaid enrollees had at least one routine asthma visit compared to 74.3% of privately insured children. Most children received at least one asthma medication (88.6% Medicaid vs. 83.3% privately insured), but a higher percentage of Medicaid-insured children received at least one rescue medication (84.0% vs. 73.7%), and a lower percentage of Medicaid-insured (46.1% vs. 49.2%) received a controller medication. These results suggest that opportunities for improvement in childhood asthma persist, particularly for children insured by Medicaid.

Association of Postpartum Mental Illness Diagnoses with Severe Maternal Morbidity.

Background: This study aimed to determine whether birthing people who experience severe maternal morbidity (SMM) are more likely to be diagnosed with a postpartum mental illness. Materials and Methods: Using the Massachusetts All Payer Claims Database, this study used modified Poisson regression analysis to assess the association of SMM with mental illness diagnosis during the postpartum year, accounting for prenatal mental illness diagnoses and other patient characteristics. Results: There were 128,161 deliveries identified, with 55.0% covered by Medicaid. Of these, 3.1% experienced SMM during pregnancy and/or delivery hospitalization, and 20.1% had a mental illness diagnosis within 1 year postpartum. In adjusted regression analyses, individuals with SMM had a 10.6% increased risk of having any mental illness diagnosis compared to individuals without SMM, primarily due to an increased risk of a depression or post-traumatic stress disorder diagnosis among people with SMM than those without SMM. Conclusions: Individuals who experienced SMM had a higher risk of a mental illness diagnosis in the postpartum year. Given increases in SMM in the United States in recent decades, policies to mitigate mental health sequelae of SMM are urgently needed.

The Patient Protection and Affordable Care Act and Pediatric Medical Clinicians' Application of Fluoride Varnish.

Importance: Fluoride varnish reduces children's tooth decay, yet few clinicians provide it. Most state Medicaid programs have covered this service during medical visits for children aged 1 to 5 years, but private insurers began covering it only in 2015 due to the Patient Protection and Affordable Care Act (ACA) mandate that they cover a set of recommended preventive services without cost-sharing. Evidence on clinicians' behavior change postmandate is limited. Objective: To examine monthly changes in fluoride varnish applications among pediatric clinicians following the ACA mandate. Design, Setting, and Participants: Using all-payer claims data from Massachusetts, this cohort study applied an interrupted time-series approach with linear regression models comparing changes in monthly clinician-level outcomes before and after the mandate. Participants included clinicians who billed at least 5 well-child visits for patients aged 1 to 5 years and were observed at least once premandate. Adjusted for clinician fixed effects, models were assessed overall and separately for clinicians categorized by their monthly share of well-child visits paid by private insurers before the mandate: mostly private (>66% of visits paid by private insurers), mostly public (<33% of visits paid by private insurers), or mixed (33%-66% of visits paid by private insurers) insurance types. Analysis was performed from June 1, 2022, to July 31, 2023. Exposure: Preenactment and postenactment of the ACA mandate for private insurers to cover fluoride varnish applications without cost-sharing. Main Outcomes and Measures: Clinician-month measures of whether fluoride varnish was provided during at least 1 well-child visit and the share of such visits, analyzed separately for clinicians who did and did not apply fluoride varnish premandate. Results: The sample included 2405 clinicians, with 107 841 clinician-months. Premandate, 10.48% of the visits included fluoride varnish applications. Two years postmandate, the likelihood of ever applying fluoride varnish was 13.64 (95% CI, 10.97-16.32) percentage points higher. For clinicians providing fluoride varnish premandate, the share of visits with fluoride varnish increased by 9.22 (95% CI, 5.41-13.02) percentage points. This increase was observed in clinicians who treated children with insurance that was mostly mixed and mostly private; no substantial change was observed among those treating children with mostly public insurance. Conclusions and Relevance: In this cohort study of pediatric primary care clinicians, an association between the ACA mandate and an increase in fluoride varnish application was observed, especially among clinicians primarily treating privately insured patients and those applying it premandate. However, application remains infrequent, suggesting persistent barriers.

Maternal Health Equity in Medicaid Accountable Care Organizations: Early Lessons from the Massachusetts Experience.

There are substantial inequities by race and ethnicity in maternal health care utilization and health outcomes across the perinatal period. As Medicaid covers 42% of births nationally and almost two-thirds of births to Black birthing people, state Medicaid financing and delivery system reforms have substantial scope to impact these inequities. Twenty-one states have implemented Medicaid Accountable Care Organizations (ACOs) at some point since 2015. Using public documents and interviews with ACO administrators, we examine the implications of Massachusetts Medicaid ACOs, implemented in March 2018, for maternal health equity. Although these Medicaid ACOs have the potential to impact maternal health equity, they face many challenges in doing so. We review future steps within Massachusetts Medicaid ACOs and Medicaid programs more generally to incorporate policies that may better address racial and ethnic inequities.

Association Between Insurance Type and Fluoride Varnish Application During Well-Child Visits in Massachusetts.

OBJECTIVE: To compare rates of fluoride varnish (FV) applications during well-child visits for children covered by Medicaid and private medical insurance in Massachusetts. METHODS: This cross-sectional study analyzed well-child visits for children aged 1 to 5 years paid by Medicaid and private insurance during 2016.Çô18 in Massachusetts. Multivariate regression models, with all covariates interacting with insurance type, were used to calculate odds ratios and adjusted predicted probabilities of fluoride varnish during well-child visits by calendar year and age. RESULTS: Across 957,551 well-child visits, 40.0% were paid by private insurers. Unadjusted rates of fluoride varnish were significantly lower among well-child visits paid by private insurers (6.6%) than visits paid by Medicaid (14.2%). In the fully interacted regression model, the odds of a visit including fluoride varnish were significantly lower for older children than for children aged 1 for visits paid by both insurance types. Adjusted rates of fluoride varnish increased significantly from 2016 to 2018 for both insurance types. Moreover, rates were higher among visits for children covered under Medicaid than privately insured children in all years, and the differences by insurance type declined over time (2016: 8.0% points, 95% confidence interval.á=.á.êÆ8.7 to .êÆ7.3, 2018: 5.3% points, 95% confidence interval.á=.á.êÆ6.6 to .êÆ3.9). CONCLUSIONS: Rates of fluoride varnish applications during well-child visits were low for both Medicaid and private insurance despite growth from 2016 to 2018 in Massachusetts. Low rates are concerning because this is a recommended service with the potential to help address racial, geographic, and income-based disparities in access and oral health outcomes.

Maternity care clinician inclusion in Medicaid Accountable Care Organizations.

BACKGROUND: Medicaid Accountable Care Organizations (ACO) are increasingly common, but the network breadth for maternity care is not well described. The inclusion of maternity care clinicians in Medicaid ACOs has significant implications for access to care for pregnant people, who are disproportionately insured by Medicaid. PURPOSE: To address this, we evaluate obstetrician-gynecologists (OB/GYN), maternal-fetal medicine specialists (MFM), certified nurse midwives (CNM), and acute care hospital inclusion in Massachusetts Medicaid ACOs. METHODOLOGY/APPROACH: Using publicly available provider directories for Massachusetts Medicaid ACOs (n = 16) from December 2020 -January 2021, we quantify obstetrician-gynecologists, maternal-fetal medicine specialists, CNMs, and acute care hospital with obstetric department inclusion in each Medicaid ACO. We compare maternity care provider and acute care hospital inclusion across and within ACO type. For Accountable Care Partnership Plans, we compare maternity care clinician and acute care hospital inclusion to ACO enrollment. RESULTS: Primary Care ACO plans include 1185 OB/GYNs, 51 MFMs, and 100% of Massachusetts acute care hospitals, but CNMs were not easily identifiable in the directories. Across Accountable Care Partnership Plans, a mean of 305 OB/GYNs (median: 97; range: 15-812), 15 MFMs (Median: 8; range: 0-50), 85 CNMs (median: 29; range: 0-197), and half of Massachusetts acute care hospitals (median: 23.81%; range: 10%-100%) were included. CONCLUSION AND PRACTICE IMPLICATIONS: Substantial differences exist in maternity care clinician inclusion across and within ACO types. Characterizing the quality of included maternity care clinicians and hospitals across ACOs is an important target of future research. Highlighting maternal healthcare as a key area of focus for Medicaid ACOs-including equitable access to high-quality obstetric providers-will be important to improving maternal health outcomes.

Differences in Insurance Coverage for Individuals With Schizophrenia After Implementation of the Patient Protection and Affordable Care Act.

This cross-sectional study uses Medical Expenditure Panel Survey data to assess differences in insurance coverage for individuals with schizophrenia before vs after implementation of the Patient Protection and Affordable Care Act (ACA).

Transitions in Health Insurance During the Perinatal Period Among Patients With Continuous Insurance Coverage.

Importance: Although health insurance continuity is important during the perinatal period to improve birth outcomes and reduce maternal morbidity and mortality, insurance disruptions are common. However, little is known about insurance transitions among insurance types for individuals who remained insured during the perinatal period. Objective: To examine insurance transitions for birthing individuals with continuous insurance, including those with Medicaid and Medicaid managed care coverage, before, during, and after pregnancy. Design, Setting, and Participants: This cohort study used January 1, 2014 to December 31, 2018 data from the Massachusetts All-Payer Claims Database. The sample included deliveries from January 1, 2015, to December 31, 2017, to birthing individuals aged 18 to 44 years old with continuous insurance for 12 months before and after delivery. Data were analyzed from November 9, 2021, to September 2, 2022. Exposure: Insurance type at delivery. Main Outcomes and Measures: The primary outcome was a binary indicator of any transition in insurance type from 12 months before and/or after delivery. The secondary outcomes were measures of any predelivery transition (12 months before delivery month) and any transition during the postpartum period (delivery month to 12 months post partum). Multivariate logit regression models were used to analyze the association of an insurance transition in the perinatal period with insurance type in the delivery month, controlling for age and socioeconomic status based on a 5-digit zip code. Results: The analytic sample included 97 335 deliveries (mean [SD] maternal age at delivery, 30.4 [5.5] years). Of these deliveries, 23.4% (22 794) were insured by Medicaid and 28.1% (27 347) by Medicaid managed care in the delivery month. A total of 37.1% of the sample (36 127) had at least 1 insurance transition during the 12 months before and/or after delivery. In regression-adjusted analyses, those individuals covered by Medicaid and Medicaid managed care at delivery were 47.0 (95% CI, 46.3-47.7) percentage points and 50.1 (95% CI, 49.4-50.8) percentage points, respectively, more likely to have an insurance transition than those covered by private insurance. Those covered by Marketplace plans at delivery had a 33.1% (95% CI, 31.4%-34.8%) regression-adjusted predicted probability of having a postpartum insurance transition. Conclusions and Relevance: Results of this study showed that insurance transitions during the perinatal period occurred for more than 1 in 3 birthing individuals with continuous insurance and were more common among those with Medicaid or Medicaid managed care at delivery. Further research is needed to examine the role of insurance transitions in health care use and outcomes during the perinatal period.

Variation in prices for an evidence-based pediatric preventive service.

OBJECTIVE: To examine variation in prices paid by private medical insurers for fluoride varnish applications in medical settings, a newly reimbursed service that few children receive. DATA SOURCES: Private-insurance medical claims from Connecticut, Maine, New Hampshire, and Rhode Island (2016-2018). STUDY DESIGN: We examined prices paid for fluoride varnish by private insurers and compared these to prices paid by Medicaid. DATA COLLECTION/EXTRACTION METHODS: Private claims for fluoride varnish during medical visits for children aged 1-5 years. State Medicaid rates for fluoride varnish were obtained from the American Academy of Pediatrics. PRINCIPAL FINDINGS: Prices paid for fluoride varnish by private insurers varied within and across states, ranging from less than $5 to $50. Median prices closely followed Medicaid rates in three of the four states. In states covering a package of fluoride varnish plus additional preventive oral health services during medical visits, combined Medicaid rates were nearly double the median price paid by private insurers. CONCLUSIONS: Fluoride varnish is a recommended service, but few children receive it. Price variation may contribute to the low uptake of this service. Ensuring sufficient Medicaid and private insurance rates could increase fluoride varnish applications in medical settings and improve oral health.

Postpartum Visit Attendance in the United States: A Systematic Review.

INTRODUCTION: Adequate postpartum care, including the comprehensive postpartum visit, is critical for long-term maternal health and the reduction of maternal mortality, particularly for people who may lose insurance coverage postpartum. However, variation in previous estimates of postpartum visit attendance in the United States makes it difficult to assess rates of attendance and associated characteristics. METHODS: We conducted a systematic review of estimates of postpartum visit attendance. We searched PubMed, CINAHL, PsycInfo, and Web of Science for articles published in English from 1995 to 2020 using search terms to capture postpartum visit attendance and use in the United States. RESULTS: Eighty-eight studies were included in this analysis. Postpartum visit attendance rates varied substantially, from 24.9% to 96.5%, with a mean of 72.1%. Postpartum visit attendance rates were higher in studies using patient self-report than those using administrative data. The number of articles including an estimate of postpartum visit attendance increased considerably over the study period; the majority were published in 2015 or later. CONCLUSIONS: Our findings suggest that increased systematic data collection efforts aligned with postpartum care guidelines and attention to postpartum visit attendance rates may help to target policies to improve maternal wellbeing. Most estimates indicate that a substantial proportion of women do not attend at least one postpartum visit, potentially contributing to maternal morbidity as well as preventing a smooth transition to future well-woman care. Estimates of current postpartum visit attendance are important for informing efforts that seek to increase postpartum visit attendance rates and to improve the quality of care.

Perceived discrimination during the childbirth hospitalization and postpartum visit attendance and content: Evidence from the Listening to Mothers in California survey.

OBJECTIVE: Postpartum visits are an important opportunity to address ongoing maternal health. Experiences of discrimination in healthcare can impact healthcare use, including postpartum visits. However, it is unknown whether discrimination is associated with postpartum visit content. This study aimed to examine the relationship between perceived discrimination during the childbirth hospitalization and postpartum visit attendance and content. RESEARCH DESIGN: Data were from Listening to Mothers in California, a population-based survey of people with a singleton hospital birth in California in 2016. Adjusted logistic regression models estimated the association between perceived discrimination during the childbirth hospitalization and 1) postpartum visit attendance, and 2) topics addressed at the postpartum visit (birth control, depression and breastfeeding) for those who attended. RESULTS: 90.6% of women attended a postpartum visit, and 8.6% reported discrimination during the childbirth hospitalization. In adjusted models, any discrimination and insurance-based discrimination were associated with 7 and 10 percentage point (pp) lower predicted probabilities of attending a postpartum visit, respectively. There was a 7pp lower predicted probability of discussing birth control for women who had experienced discrimination (81% vs. 88%), a 15pp lower predicted probability of being asked about depression (64% vs. 79%), and a 9 pp lower predicted probability of being asked about breastfeeding (57% vs. 66%). CONCLUSIONS: Amid heightened attention to the importance of postpartum care, there is a need to better understand determinants of postpartum care quality. Our findings highlight the potential consequences of healthcare discrimination in the perinatal period, including lower quality of postpartum care.

The association of insurance plan characteristics with physician patient-sharing network structure.

Professional and social connections among physicians impact patient outcomes, but little is known about how characteristics of insurance plans are associated with physician patient-sharing network structure. We use information from commercially insured enrollees in the 2011 Massachusetts All Payer Claims Database to construct and examine the structure of the physician patient-sharing network using standard and novel social network measures. Using regression analysis, we examine the association of physician patient-sharing network measures with an indicator of whether a patient is enrolled in a health maintenance organization (HMO) or preferred provider organization (PPO), controlling for patient and insurer characteristics and observed health status. We find patients enrolled in HMOs see physicians who are more central and densely embedded in the patient-sharing network. We find HMO patients see PCPs who refer to specialists who are less globally central, even as these specialists are more locally central. Our analysis shows there are small but significant differences in physician patient-sharing network as experienced by patients with HMO versus PPO insurance. Understanding connections between physicians is essential and, similar to previous findings, our results suggest policy choices in the insurance and delivery system that change physician connectivity may have important implications for healthcare delivery, utilization and costs.

Association of Insurance Status With Provision of Recommended Services During Comprehensive Postpartum Visits.

Importance: Improving care during the postpartum period is a clinical and policy priority. During the comprehensive postpartum visit, guidelines recommend delivery of a large number of assessment, screening, and counseling services. However, little is known about services provided during these visits. Objective: To examine rates of recommended services during the comprehensive postpartum visits and differences by insurance type. Design, Setting, and Participants: This cross-sectional study included 20 071 093 weighted office-based postpartum visits (645 observations) with obstetrical-gynecological or family medicine physicians from annual National Ambulatory Medical Care Surveys from December 28, 2008, to December 31, 2016, and estimated multivariate regression models to calculate the frequency of recommended services by insurance type, controlling for visit, patient, and physician characteristics. Data analysis was conducted from November 1, 2019, to September 1, 2020. Exposures: Visit paid by Medicaid vs other payment types. Main Outcomes and Measures: Visit length and binary indicators of blood pressure measurement, depression screening, contraceptive counseling or provision, pelvic examinations, Papanicolaou tests, breast examinations, medication ordered or provided, referral to other physician, and counseling for weight reduction, exercise, stress management, diet and/or nutrition, and tobacco use. Results: A total of 20 071 093 weighted comprehensive postpartum visits to office-based family medicine or obstetrical-gynecological physicians were included (mean patient age, 29.7 [95% CI, 29.1-30.3] years). Of these visits, 34.3% (95% CI, 27.6%-41.1%) were covered by Medicaid. Mean visit length was 17.4 (95% CI, 16.4-18.5) minutes. The most common procedures were blood pressure measurement (91.1% [95% CI, 88.0%-94.2%]), pelvic examinations (47.3% [95% CI, 40.8%-53.7%]), and contraception counseling or provision (43.8% [95% CI, 38.2%-49.3%]). Screening for depression (8.7% [95% CI, 4.1%-12.2%]) was less common. When controlling for visit, patient, and physician characteristics, the only significant difference in visit length or provision of recommended services based on insurance type was a difference in provision of breast examinations (14.7% [95% CI, 8.0%-21.5%] for Medicaid vs 25.6% [95% CI, 19.4%-31.8%] for non-Medicaid; P = .02). Conclusions and Relevance: These findings suggest that receipt of recommended services during comprehensive postpartum visits is less than 50% for most services and is similar across insurance types. These findings underscore the importance of efforts to reconceptualize postpartum care to ensure women have access to a range of supports to manage their health during this sensitive period.

The association between patient sharing network structure and healthcare costs.

STUDY QUESTION: While physician relationships (measured through shared patients) are associated with clinical and utilization outcomes, the extent to which this is driven by local or global network characteristics is not well established. The objective of this research is to examine the association between local and global network statistics with total medical spending and utilization. DATA SOURCE: Data used are the 2011 Massachusetts All Payer Claims Database. STUDY DESIGN: The association between network statistics and total medical spending and utilization (using standardized prices) is estimated using multivariate regression analysis controlling for patient demographics and health status. DATA COLLECTION: We limit the sample to continuously enrolled commercially insured patients in Massachusetts in 2011. PRINCIPAL FINDINGS: Mean patient age was 45 years, and 56.3% of patients were female. 73.4% were covered by a health maintenance organization. Average number of visits was 5.43, with average total medical spending of $4,911 and total medical utilization of $4,252. Spending was lower for patients treated by physicians with higher degree (p<0.001), eigenvector centrality (p<0.001), clustering coefficient (p<0.001), and measures reflecting the normalized degree (p<0.001) and eigenvector centrality (p<0.001) of specialists connected to a patient's PCP. Spending was higher for patients treated by physicians with higher normalized degree, which accounts for physician specialty and patient panel size (p<0.001). Results were similar for utilization outcomes, although magnitudes differed indicating patients may see different priced physicians. CONCLUSIONS: Generally, higher values of network statistics reflecting local connectivity adjusted for physician characteristics are associated with increased costs and utilization, while higher values of network statistics reflecting global connectivity are associated with decreased costs and utilization. As changes in the financing and delivery system advance through policy changes and healthcare consolidation, future research should examine mechanisms through which this structure impacts outcomes and potential policy responses to determine ways to reduce costs while maintaining quality and coordination of care. WHAT THIS STUDY ADDS: It is unknown whether local and global measures of physician network connectivity associated with spending and utilization for commercially insured patients?In this social network analysis, we found generally higher values of network statistics reflecting local connectivity are associated with increased costs and utilization, while higher values of network statistics reflecting global connectivity are associated with decreased costs and utilization.Understanding how to influence local and global physician network characteristics may be important for reducing costs while maintaining quality.

Evaluation of Availability of Survey Data About Cannabis Use.

Importance: In response to increasing public support for cannabis legalization, understanding associations of state and federal policy changes related to cannabis legalization with patterns of cannabis use is important. A challenge for public health monitoring and research is significant variation in data availability related to cannabis use behaviors and perceptions across and within states and over time, including the availability of prelegalization vs postlegalization data. Objective: To review data available on cannabis use and related behaviors over time in Massachusetts and the US. Design, Setting, and Participants: This case series examined state and national surveys on public health and related behaviors and outcomes to review availability of cannabis-related data for Massachusetts for 8 key indicators over time. Additionally, the Behavioral Risk Factor Surveillance System (BRFSS) and Youth Risk Behavior Surveillance System for all states were reviewed. The analysis was conducted between February 1, 2019, and March 18, 2020. Exposures: Surveys that enable state-level estimation of cannabis use and related behaviors. Main Outcomes and Measures: Eight key indicators related to cannabis use behaviors and perceptions: lifetime cannabis use, age of initiation, frequency of use, location of use, method of use, source of cannabis, perceptions of cannabis, and reason for use (ie, medical vs nonmedical). Results: There were 7 surveys that monitored cannabis use and related behaviors in Massachusetts for adolescents and adults. No surveys monitored all 8 indicators of interest, and availability over time was limited. In the most recent BRFSS, 24 states asked cannabis-related questions, meaning BRFSS data on cannabis use was lacking for more than half of the US adult population. In the Youth Risk Behavior Surveillance System, 36 states asked standard cannabis questions; most other states had at least 1 question related to cannabis use and frequency. Conclusions and Relevance: These findings of limitations of existing surveys, and particularly the lack of national questions in the BRFSS and Youth Risk Behavior Surveillance System, suggest that available data have substantial limitations for monitoring cannabis use. As cannabis policy changes continue, there is a need to remain focused on the availability of high-quality data sources that allow for critical public health research.

Changes in Medicaid Acceptance by Substance Abuse Treatment Facilities After Implementation of Federal Parity.

BACKGROUND: Adequate access for mental illness and substance use disorder (SUD) treatment, particularly for Medicaid enrollees, is challenging. Policy efforts, including the Mental Health Parity and Addiction Equity Act (MHPAEA), have targeted expanded access to care. With MHPAEA, more Medicaid plans were required to increase their coverage of SUD treatment, which may impact provider acceptance of Medicaid. OBJECTIVES: To identify changes in Medicaid acceptance by SUD treatment facilities after the implementation of MHPAEA (parity). RESEARCH DESIGN: Observational study using an interrupted time series design. SUBJECTS: 2002-2013 data from the National Survey of Substance Abuse Treatment Services (N-SSATS) for all SUD treatment facilities was combined with state-level characteristics. MEASURES: Primary outcome is whether a SUD treatment facility reported accepting Medicaid insurance. RESULTS: Implementation of MHPAEA was associated with a 4.6 percentage point increase in the probability of an SUD treatment facility accepting Medicaid (P<0.001), independent of facility and state characteristics, time trends, and key characteristics of state Medicaid programs. CONCLUSIONS: After parity, more SUD treatment facilities accepted Medicaid payments, which may ultimately increase access to care for individuals with SUD. The findings underscore how parity laws are critical policy tools for creating contexts that enable historically vulnerable and underserved populations with SUD to access needed health care.

The Role of Organizational Affiliations in Physician Patient-Sharing Relationships.

Provider consolidation may enable improved care coordination, but raises concerns about lack of competition. Physician patient-sharing relationships play a key role in constructing patient care teams, but it is unknown how organization affiliations affect these. We use the Massachusetts All Payer Claims Database to examine whether patient-sharing relationships are associated with sharing a practice site, medical group, and/or physician contracting network. Physicians were 17 percentage points more likely to have a patient-sharing relationship if they shared a practice site and 4 percentage points more likely if they shared a medical group, as compared with sharing no affiliation. However, there was no detectable increased probability of a patient-sharing relationship within the same physician contracting network. Our finding that physician patient-sharing relationships are concentrated within organizational boundaries at practice site and medical group levels helps illuminate referral incentives and provide insight into the role of organizational affiliations in patient care team construction.

Association Between Specialist Office Visits and Health Expenditures in Accountable Care Organizations.

Importance: Accountable care organizations (ACOs) aim to control health expenditures while improving quality of care. Primary care has been emphasized as a means to reduce spending, but little is known about the implications of using specialists for achieving this ACO objective. Objective: To examine the association between ACO-beneficiary office visits conducted by specialists and the cost and utilization outcomes of those visits. Design, Setting, and Participants: This cross-sectional study obtained data on 620 distinct ACOs from the Centers for Medicare & Medicaid Services Shared Savings Program Accountable Care Organizations Public-Use Files from April 1, 2012, to September 30, 2017. Generalized estimating equation models were used for analysis of ACOs, adjusting for ACO-beneficiary health status, Medicare enrollment groups, ACO size, and proportion of participating specialists. Exposures: Specialist encounter proportion, the percentage of office visits provided by a specialist, was categorized into 7 discrete groups: less than 35%, 35% to less than 40%, 40% to less than 45% (reference group), 45% to less than 50%, 50% to less than 55%, 55% to less than 60%, and 60% or greater. Main Outcomes and Measures: The primary outcome was total expenditures (given in US dollars) per assigned beneficiary person-year. The secondary outcomes were total numbers of emergency department visits, hospital discharges, skilled nursing facility discharges, and magnetic resonance imaging orders. Results: In total, the data set included 1836 ACO-year (number of participation years per ACO) observations for 620 distinct ACOs. Those ACOs with a specialist encounter proportion of 40% to less than 45% had $1129 (95% CI, $445-$1814) lower per-beneficiary person-year spending than did ACOs in the lowest specialist encounter proportion group and had $752 (95% CI, $115-$1389) lower per-beneficiary person-year spending compared with ACOs in the highest specialist encounter proportion group. Monotonic decreases in emergency department visits, hospital discharges, and skilled nursing facility discharges were observed with increasing specialist encounter proportion. Conversely, monotonic increases in magnetic resonance imaging volume discharges were observed with increasing specialist encounter proportion. Conclusions and Relevance: These findings suggest that an ACO's ability to reduce spending may require sufficient involvement in care processes from specialists, who seem to complement the intrinsic primary care approach in ACOs.