The Impact of the Affordable Care Act (ACA) Medicaid Expansion on Visit Rates for Diabetes in Safety Net Health Centers.

OBJECTIVE: To (1) compare clinic-level uninsured, Medicaid-insured, and privately insured visit rates within and between expansion and nonexpansion states before and after the Affordable Care Act (ACA) Medicaid expansion among the 3 cohorts of patient populations; and (2) assess whether there was a change in clinic-level overall, primary care visits, preventive care visits, and diabetes screening rates in expansion versus nonexpansion states from pre-ACA to post-ACA Medicaid expansion. METHODS: Electronic health record data on nonpregnant patients aged 19 to 64 years, with ≥1 ambulatory visit between 01/01/2012 and 12/31/2015 (n = 483,912 in expansion states; n = 388,466 in nonexpansion states) from 198 primary care community health centers were analyzed. Using a difference-in-difference methodology, we assessed changes in visit rates pre-ACA versus post-ACA among a cohort of patients with diabetes, prediabetes, and no diabetes. RESULTS: Rates of uninsured visits decreased for all cohorts in expansion and nonexpansion states. For all cohorts, Medicaid-insured visit rates increased significantly more in expansion compared with nonexpansion states, especially among prediabetic patients (+71%). In nonexpansion states, privately insured visit rates more than tripled for the prediabetes cohort and doubled for the diabetes and no diabetes cohorts. Rates for glycosylated hemoglobin screenings increased in all groups, with the largest changes among no diabetes (rate ratio, 2.26; 95% CI, 1.97-2.56) and prediabetes cohorts (rate ratio, 2.00; 95% CI, 1.80-2.19) in expansion states. CONCLUSION: The ACA reduced uninsurance and increased access to preventive care for vulnerable patients, especially those with prediabetes. These findings are important to consider when making decisions regarding altering the ACA.

Gatekeeping and the utilization of physician services in France: Evidence on the Médecin traitant reform.

In 2005, France implemented a gatekeeping reform designed to improve care coordination and to reduce utilization of specialists' services. Under this policy, patients designate a médecin traitant, typically a general practitioner, who will be their first point of contact during an episode of care and who will provide referrals to specialists. A key element of the policy is that patients who self-refer to a specialist face higher cost sharing than if they received a referral from their médecin traitant. We consider the effect of this policy on the utilization of physician services. Our analysis of administrative claims data spanning the years 2000-2008 indicates that visits to specialists, which were increasing in the years prior to the implementation of the reform, fell after the policy was in place. Additional evidence from the administrative claims as well as survey data suggest that this decline arose from a reduction in self-referrals, which is consistent with the objectives of the policy. Visits fell significantly both for specialties targeted by the policy and specialties for which self-referrals are still allowed for certain treatments. This apparent spillover effect may suggest that, at least initially, patients did not understand the subtleties of the policy.

A retrospective cohort study of long-term immediate-release hydrocodone/acetaminophen use and acetaminophen dosing above the Food and Drug Administration recommended maximum daily limit among commercially insured individuals in the United States (2008-2013).

UNLABELLED: Immediate-release (IR) hydrocodone/acetaminophen is the most prescribed opioid in the United States; however, patterns of use, including long-term treatment and dose, are not well described. Duration of use, including the percentage of patients on long-term treatment (>90 days of continuous use), was assessed for patients newly prescribed IR hydrocodone/acetaminophen compared to other opioid analgesics in a national commercial insurance database (January 2008-September 2013). Though only a small percentage of IR hydrocodone/acetaminophen patients continued treatment long-term (1.7%), the number was large (104,839) and was nearly 5 times the number receiving extended-release (ER) morphine (n = 22,338) and nearly 4 times the number receiving ER oxycodone (n = 26,946) long-term. Using a less conservative allowable gap in treatment increased the number of patients meeting the criteria for long-term use (approximately 160,000 for IR hydrocodone/acetaminophen vs <30,000 for ER morphine and ER oxycodone). Most patients meeting these criteria received IR hydrocodone doses between >20 and ≤60 mg/d (n = 56,220, 53.6%) in month 4; 5.5% (n = 5,743) received doses >60 mg/d. Moreover, approximately 15% of IR hydrocodone/acetaminophen patients (n > 900,000) were prescribed total daily acetaminophen doses exceeding 4 g (the limit recommended by the U.S. Food and Drug Administration) at their initial IR hydrocodone/acetaminophen prescription or any time during therapy. PERSPECTIVE: Although most patients were prescribed IR hydrocodone/acetaminophen for acute pain, the number of patients prescribed long-term therapy exceeds the number of patients prescribed ER opioids. It is important to consider the benefits and risks inherent with long-term opioid therapy, whether with IR or ER opioids, to ensure safe use of these products.

Impact of once-daily versus twice-daily dosing frequency on adherence to chronic medications among patients with venous thromboembolism.

BACKGROUND: Multiple daily dosing may be negatively associated with patient medication adherence; however, adherence-related data are lacking in a patient population with venous thromboembolism (VTE). OBJECTIVE: To assess the adherence rates between once-daily (OD) and twice-daily (BID) dosing regimens of chronic medications in patients with VTE. METHODS: We analyzed the PharMetrics Integrated Claims database (claims of commercial insurers in the US) from 1 January 2004, through 31 December 2009. Adult patients with continuous insurance coverage, newly initiated on diabetes mellitus or hypertension medication, and having at least one VTE diagnosis were included. Adherence to OD and BID therapies was calculated by using two measures: medication possession ratio (MPR) and proportion of days covered (PDC). Adherence was defined as an MPR or PDC ≥0.8. Multivariate logistic regressions were conducted to compare the probability of adherence between the OD and BID groups adjusting for baseline confounders. RESULTS: A total of 4,867 OD and 1,069 BID patients were identified. Mean duration of exposure to therapy for OD and BID patients was 386 and 356 days (p = 0.011), respectively. Based on MPR, 69 % of OD and 62 % of BID patients were adherent (p < 0.001). For PDC at 12 months, the proportion of adherent patients for the OD and BID groups was 45 and 36 % (p < 0.001), respectively. Adjusted odds ratios (95 % CI) of adherence for the OD relative to BID group were 1.61 (1.37-1.89) based on MPR (p < 0.001) and 1.46 (1.16-1.83) based on PDC at 12 months (p = 0.001). CONCLUSIONS: This study demonstrates that VTE patients treated with chronic medications on OD dosing regimens were associated with an approximately 39-61 % higher likelihood of adherence compared with subjects on BID dosing regimens.

[An international comparison of physician control systems].

This study compares physicians' regulations set by the United Kingdom, the United States, Canada and Germany which have typical healthcare systems. Physicians' regulations are defined in this study as four aspects: physicians' training and qualifications, career pathways, payment methods and behavior regulations. Strict access rules, practicing with freedom, different training models between general and special practitioners, health services priced by negotiations and regulations by professional organizations are the common features of physicians' regulations in these four western countries. Three aspects--introducing contract mechanism, enhancing the roles of professional organizations and extending physicians' practice space should be taken into account in China's future reform of physicians' regulations.

Herpes zoster incidence among insured persons in the United States, 1993-2006: evaluation of impact of varicella vaccination.

BACKGROUND: herpes zoster (HZ) is caused by reactivation of latent varicella zoster virus and is often associated with substantial pain and disability. Baseline incidence of HZ prior to introduction of HZ vaccine is not well described, and it is unclear whether introduction of the varicella vaccination program in 1995 has altered the epidemiology of HZ. We examined trends in the incidence of HZ and impact of varicella vaccination on HZ trends using a large medical claims database. METHODS: medical claims data from the MarketScan databases were obtained for 1993-2006. We calculated HZ incidence using all persons with a first outpatient service associated with a 053.xx code (HZ ICD-9 code) as the numerator, and total MarketScan enrollment as the denominator; HZ incidence was stratified by age and sex. We used statewide varicella vaccination coverage in children aged 19-35 months to explore the impact of varicella vaccination on HZ incidence. RESULTS: HZ incidence increased for the entire study period and for all age groups, with greater rates of increase 1993-1996 (P < .001). HZ rates were higher for females than males throughout the study period (P < .001) and for all age groups (P < .001). HZ incidence did not vary by state varicella vaccination coverage. CONCLUSIONS: HZ incidence has been increasing from 1993-2006. We found no evidence to attribute the increase to the varicella vaccine program.

Penile prosthesis implantation compares favorably in malpractice outcomes to other common urological procedures: findings from a malpractice insurance database.

INTRODUCTION: Some urologists choose not to offer penile prostheses because of concern over malpractice liability. AIM: The aim of this study was to assess whether urologists performing penile prosthesis surgery are placed at a greater malpractice risk. MAIN OUTCOME MEASURES: Percentage of malpractice suits from prosthesis surgery and other urological procedures that result in payment, average resulting payout from these cases, and category of legal issue that ultimately resulted in payout. METHODS: A database from the Physician Insurers Association of America, an association of malpractice insurance companies covering physicians in North America, was analyzed to quantitatively compare penile implant surgery to other urological procedures in medicolegal terms. RESULTS: Compared to other common urological procedures, penile implant is comparable and on the lower end of the spectrum in terms of both the percentage of malpractice suits that result in payment and the amount ultimately paid in indemnity from those cases. Additionally, issues of informed consent play the largest role in indemnities for all urological procedures, whereas surgical technique is the most important issue for prosthesis surgery. CONCLUSIONS: Urologists who are adequately trained in prosthetic surgery should not avoid penile implant procedures for fear of malpractice suits. A focus on communication and informed consent can greatly reduce malpractice risk for urological procedures.

Pursuing equity: contact with primary care and specialist clinicians by demographics, insurance, and health status.

PURPOSE: Long-term shifts in specialty choice and health workforce policy have raised concern about the future of primary care in the United States. The objective of this study was to examine current use of primary and specialty care across the US population for policy-relevant subgroups, such as disadvantaged populations and persons with chronic illness. METHODS: Data from the Medical Expenditure Panel Survey from 2004 were analyzed using a probability sample patients or other participants from the noninstitutionalized US population in 2004 (N = 34,403). The main and secondary outcome measures were the estimates of the proportion of Americans who accessed different types of primary care and specialty physicians and midlevel practitioners, as well as the fraction of ambulatory visits accounted for by the different clinician types. Data were disaggregated by income, health insurance status, race/ethnicity, rural or urban residence, and presence of 5 common chronic diseases. RESULTS: Family physicians were the most common clinician type accessed by adults, seniors, and reproductive-age women, and they were second to pediatricians for children. Disadvantaged adults with 3 markers of disadvantage (poverty, disadvantaged minority, uninsured) received 45.6% (95% CI, 40.4%-50.7%) of their ambulatory visits from family physicians vs 30.5% (95% CI, 30.0%-32.1%) for adults with no markers. For children with 3 vs 0 markers of disadvantage, the proportion of visits from family physicians roughly doubled from 16.5% (95% CI, 14.4%-18.6%) to 30.1% (95% CI, 18.8%-41.2%). Family physicians constitute the only clinician group that does not show income disparities in access. Multivariate analyses show that patterns of access to family physicians and nurse-practitioners are more equitable than for other clinician types. CONCLUSIONS: Primary care clinicians, especially family physicians, deliver a disproportionate share of ambulatory care to disadvantaged populations. A diminished primary care workforce will leave considerable gaps in US health care equity. Health care workforce policy should reflect this important population-level function of primary care.

Specialty referral completion among primary care patients: results from the ASPN Referral Study.

PURPOSE: This study describes referral completion from the perspectives of patients and primary care physicians and identifies predictors of adherence to the referral recommendation. METHODS: We observed a cohort of 776 referred patients from the offices of 133 physicians in 81 practices and 30 states. Referring physicians and patients completed self-administered questionnaires at the time of the referral decision and 3 months later. RESULTS: Physicians reported that 79.2% of patients referred had a specialist visit, and 83.0% of patients indicated they completed the referral. The most common reasons for not completing the referral were "lack of time" and patient belief that the "health problem had resolved." The kappa statistic for patient-physician agreement on referral completion was 0.34, indicating only fair concordance. Patients in Medicaid plans were less likely than others to complete the referral, and more likely to experience a health plan denial. A longer duration of the patient relationship with the primary care physician and physician/staff scheduling of the specialty appointment were both positive predictors of referral completion. CONCLUSIONS: About 8 in 10 patients referred from primary care complete a specialty referral within 3 months. Findings from this study suggest that referral completion rates may be increased by assisting patients with scheduling their specialty appointments and promoting continuity of care.

Estimating osteoarthritis incidence from population-based administrative health care databases.

PURPOSE: The aim of the study is to develop a method to estimate osteoarthritis (OA) incidence by using administrative health care databases. METHODS: Using actual counts of OA diagnoses in different periods, we generated an equation that estimated the number of new OA diagnoses based on the length of time used for excluding prevalent OA cases. Physicians billing files from 1983 to 2002 maintained at Alberta Health and Wellness were used to verify the proposed method. Age- and sex-specific and crude OA incidences in 2002 were calculated by using this method. RESULTS: Women aged 50 to 59 years had the greatest incidence. For men, the greatest incidence was in the 60- to 69-year age category. Crude incidences for women and men were 1103 and 934 per 100,000 person-years, respectively. The overall crude rate was 1040 per 100,000 person-years. CONCLUSIONS: Modified power function accurately summarizes the relationship between number of first OA diagnoses and length of the clearance period and thus provides an effective model to estimate OA incidence. Not restricted to OA, this model also can be implemented to estimate incidences of other chronic conditions.

Characteristics and antecedents of progressive multifocal leukoencephalopathy in an insured population.

Based on health insurance claims from a large U.S. health insurer, the authors identified 44 progressive multifocal leukoencephalopathy (PML) cases from 2002 through 2004 and described their characteristics, including antecedent diagnoses and treatments as well as survival. Immunosuppressive conditions such as HIV/AIDS, rather than potentially immunosuppressive treatments, were the main antecedents of PML. A lower mortality was observed among PML patients whose antecedent diagnosis was HIV/AIDS, the majority of whom received highly active antiretroviral therapy.

Getting your game on with business data.

Data warehouses can virtually eliminate claims-related paper and fax transactions for hospitals. Data are accessible electronically, decreasing the need for staff to check on outstanding claims status requests by phone. Data warehouse technology can be used to create analytical reports and identify issues by dollar volume or procedure code. Providers can receive instant reports on both the "front end," as they are submitted, and on the "back end," when claims are denied.

A retrospective cohort study of Parkinson's disease in Korean shipbuilders.

OBJECTIVE: We performed a retrospective cohort study in South Korea to clarify the role of occupational exposure, especially to welding, in the etiology of Parkinson's disease (PD). METHODS: We constructed a database of subjects classified into an exposure group (blue-collar workers) and a non-exposure group (white-collar workers) in two shipbuilding companies. Jobs of blue-collar workers were categorized into the first group of welding, the second group of fitting, grinding and finishing, cutting, and the other group. To determine new cases of PD during the follow-up period (1992-2003), we used the physician billing claims database of the National Health Insurance Corporation. For the detected PD patients in the physician billing claims database, a neurologist in our research team confirmed the appropriateness of each diagnosis by reviewing medical charts. Based on the review, we confirmed the numbers of new cases of PD and calculated the relative risk (RR) and the 95% confidence intervals (CI) by Cox regression analysis. RESULTS: In a backward selection procedure, 'age' was a significant independent variable but exposure was not. Furthermore, the RR in welders (high exposure group) was also insignificant and less than that in others (very low exposure group). CONCLUSION: This longitudinal study of shipbuilding workers supports our previous case-control studies suggesting that exposure to manganese does not increase the risk of PD.

Impact of prescription coverage on hospital and physician costs: a case study of medicare beneficiaries with chronic obstructive pulmonary disease.

BACKGROUND: It is widely believed that appropriate use of prescription medicines can reduce avoidable hospitalizations and more expensive nonpharmacologic therapies, but identifying such cost offsets in operational programs is elusive. Any possible impact would be most apparent in patients with medication-sensitive disease conditions, such as chronic obstructive pulmonary disease (COPD). OBJECTIVE: The goals of this study were to develop an observational study design appropriate for estimating potential cost savings in the US Medicare budget as a result of extending drug coverage to persons with particular chronic diseases and to apply these study methods, in an exploratory analysis, to a sample of Medicare beneficiaries with COPD. METHODS: Spending for drugs, hospitalizations, and physician services was compared for COPD patients with and without prescription coverage using data from the 1999 and 2000 US Medicare Current Beneficiary Survey. To control for channeling bias, multivariate matching on observable variables was combined with tests for missing variable bias. The matching algorithm used propensity score weighting to ensure comparability between the 2 groups on all observed characteristics at baseline. RESULTS: Our sample comprised 462 beneficiaries with prevalent COPD in the year 2000: 384 (83.1%) had prescription coverage the entire year and 78 (16.9%) had no coverage. After adjustment, drug coverage was associated with 61% higher spending on medications and 29% lower spending on physician services (both, P < 0.05). Hospital costs appeared slightly lower for those with drug benefits, but the difference was not statistically significant. No statistically significant effects were found for services specific to COPD. However, effect sizes were large even for nonsignificant findings. CONCLUSIONS: Although this analysis did not establish a strong causal link between drug benefits and lower costs, 11 of our 12 comparisons had signs consistent with the cost-offset hypothesis.

The contribution of demographic and morbidity factors to self-reported visit frequency of patients: a cross-sectional study of general practice patients in Australia.

BACKGROUND: Understanding the factors that affect patients' utilisation of health services is important for health service provision and effective patient management. This study aimed to investigate the specific morbidity and demographic factors related to the frequency with which general practice patients visit a general practitioner/family physician (GP) in Australia. METHODS: A sub-study was undertaken as part of an ongoing national study of general practice activity in Australia. A cluster sample of 10,755 general practice patients were surveyed through a random sample of 379 general practitioners. The patient reported the number of times he/she had visited a general practitioner in the previous twelve months. The GP recorded all the patient's major health problems, including those managed at the current consultation. RESULTS: Patients reported an average of 8.8 visits to a general practitioner per year. After adjusting for other patient demographics and number of health problems, concession health care card holders made on average 2.6 more visits per year to a general practitioner than did non-card holders (p <.001). After adjustment, patients from remote/very remote locations made 2.3 fewer visits per year than patients from locations where services were highly accessible (p <.001). After adjustment for patient demographics, patients with diagnosed anxiety made on average 2.7 more visits per year (p = 0.003), those with diagnosed depression 2.2 more visits than average (p <.0001), and those with back problems 2.4 more visits (p = 0.009) than patients without the respective disorders. CONCLUSIONS: Anxiety, back pain and depression are associated with greater patient demand for general practice services than other health problems. The effect of sociodemographic factors on patient utilisation of general practice services is complex. Equity of access to general practice services remains an issue for patients from remote areas, while concession health care card holders are attending general practice more frequently than other patients relative to their number of health problems.

Medicare, Medicaid, and access to dermatologists: the effect of patient insurance on appointment access and wait times.

BACKGROUND: In 2002, the Centers for Medicare and Medicaid Services implemented a 5.4% cut in Medicare physician payments, and further reductions are expected in 2004. These cuts have raised concerns that beneficiaries of Medicare will face significant problems obtaining needed physician services. Although there is clear evidence of poor access to care for patients with Medicaid, data measuring access to physicians for patients with Medicare are sparse. Given current lengthy appointment wait times resulting from a relative shortage of dermatologists, we hypothesized that patients with lower-paying coverage might be more likely to experience appointment refusals, longer wait times, or both. METHODS: Because the ability to obtain timely appointments is a key measure of access, we surveyed dermatologists in 12 medium- and large-sized communities to assess wait times for routine new-patient visits. Dermatologists in these areas (or their staff) received a telephone call asking about the next available appointment for a hypothetical patient with a randomly assigned insurance type (ie, Medicaid, Medicare, or fee-for-service private insurance). RESULTS: Of 631 physicians (or staff members) contacted, 612 (97%) agreed to participate. Overall acceptance rates were similar for patients with Medicare (85%) and private insurance (87%), but were much lower for those with Medicaid (32%). Among patients whose insurance was accepted, mean wait times for patients with Medicare and private insurance were 37 days, but patients with Medicaid experienced significant queuing (50 days). There was dramatic geographic variation. In areas where Medicare payments are low relative to commercial payers, there were increases in Medicare rejection rates and wait times. In communities with relatively low Medicaid payment rates, patients with Medicaid faced higher rejection rates and longer wait times. There were also longer overall wait times for female dermatologists and in communities where the concentration of dermatologists was low. CONCLUSION: Although overall access to dermatologists appears comparable for patients with Medicare and private insurance, some access limitations in "hot spots" where Medicare payments are low relative to commercial insurers suggest that patients in these areas may be most sensitive to further payment reductions. Significant access problems for beneficiaries of Medicaid, particularly in areas where Medicaid payments are relatively low, may be a harbinger of the potential consequences of sustained declines in Medicare physician reimbursement.