The Society of General Internal Medicine's Recommendations to Improve LGBTQ + Health.

Lesbian, gay, bisexual, transgender, queer, and other sexual and gender minority (LGBTQ +) individuals experience bias in healthcare with 1 in 6 LGBTQ + adults avoiding healthcare due to anticipated discrimination and overall report poorer health status compared to heterosexual and cisgendered peers. The Society of General Internal Medicine (SGIM) is a leading organization representing academic physicians and recognizes that significant physical and mental health inequities exist among LGBTQ + communities. As such, SGIM sees its role in improving LGBTQ + patient health through structural change, starting at the national policy level all the way to encouraging change in individual provider bias and personal actions. SGIM endorses a series of recommendations for policy priorities, research and data collection standards, and institutional policy changes as well as community engagement and individual practices to reduce bias and improve the well-being and health of LGBTQ + patients.

PrEP Uptake and Methamphetamine Use Patterns in a 4-Year U.S. National Prospective Cohort Study of Sexual and Gender Minority People, 2017-2022.

Methamphetamine use is on the rise among sexual and gender minority people who have sex with men (SGMSM), escalating their HIV risk. Despite pre-exposure prophylaxis (PrEP) being an effective biomedical HIV prevention tool, its uptake in relation to methamphetamine use patterns in SGMSM has not been studied. In a U.S. cohort study from 2017 to 2022, 6,253 HIV-negative SGMSM indicated for but not using PrEP were followed for four years. Methamphetamine use was categorized (i.e., newly initiated, persistently used, never used, used but quit), and PrEP uptake assessed using generalized estimating equation (GEE), adjusted for attrition. Participants had a median age of 29, with 51.9% White, 11.1% Black, 24.5% Latinx, and 12.5% other races/ethnicities. Over the four years, PrEP use increased from 16.3 to 27.2%. GEE models identified risk factors including housing instability and food insecurity. In contrast, older age, health insurance, clinical indications, and prior PrEP use increased uptake. Notably, Latinx participants were more likely to use PrEP than Whites. Regarding methamphetamine use, those who newly initiated it were more likely to use PrEP compared to non-users. However, those who quit methamphetamine and those who persistently used it had PrEP usage rates comparable to those of non-users. Though PrEP uptake increased, it remained low in SGMSM. Methamphetamine use was associated with PrEP uptake. Healthcare providers should assess methamphetamine use for harm reduction. Prioritizing younger, uninsured SGMSM and addressing basic needs can enhance PrEP uptake and reduce HIV vulnerabilities.

Individual and Health System Factors for Uptake of Pre-exposure Prophylaxis Among Young Black and Latino Gay Men.

BACKGROUND: Young Black and Latino men who have sex with men (YBLMSM) have the highest rates of new HIV infections in the USA and use PrEP at lower rates than White MSM. OBJECTIVE: To explore YBLMSM's perspectives and experiences of PrEP use to identify factors enabling or impeding uptake. DESIGN: Qualitative study using semi-structured interviews conducted between August 2015 and April 2016. PARTICIPANTS: Black and Latino MSM, 18-20 years of age, who live, socialize, or work in the Bronx, and were fluent in English or Spanish. APPROACH: We used a thematic analysis to identify themes related to not taking PrEP and PrEP uptake. KEY RESULTS: Half the participants (n = 9) were currently using PrEP, a majority had Medicaid (n = 13), all reported having a PCP, all identified English as their primary language (n = 15), and all identified as gay. Salient themes included concerns over-side effects, stigma related to HIV and sexuality, mistrust of medical providers, provider's refusal to prescribe PrEP, and insurance and cost. CONCLUSIONS: Modifiable barriers for PrEP uptake and persistence were reported by most participants, with an emphasis on PrEP misinformation and the pervasiveness of intersectional stigma, providers' low awareness, and hesitant attitudes towards PrEP and barriers created by insurance companies. Supportive infrastructures for PrEP providers and patients are needed.

HIV Testing by Gender Identity Among Sexually Active Transgender-, Intersex-, and Hijra Individuals Reached Online in India.

Online outreach may be an important strategy to reach Indian gender minority (GM) populations for HIV testing. However, little is known about Indian GM populations reached online who are sexually active and their HIV testing behaviors. We conducted a secondary analysis of an India wide online cross-sectional survey to assess HIV testing and identify associated factors. The 467 GM respondents identified their gender as transgender women (29.6%), Hijra (5.1%), intersex (37%), or gender non-binary (28.3%). Overall, almost half (47.5%) had never been tested for HIV; among respondents having condomless anal sex, half (50%) reported never testing for HIV. A decreased odds of ever HIV testing was associated with being unsure how to access free testing (compared to being easy; AOR = 0.36, 95%CI 0.20, 0.63) and unaware of comfortable testing sites (AOR = 0.32, 95% CI 0.20, 0.63). Increased odds of testing were associated with identifying as Hijra (compared to transgender women; AOR = 4.07, 95%CI 1.18-16.92) and disclosing sexual behaviors to a doctor (AOR = 3.20, 95% CI 1.91, 5.46). In this GM sample recruited online, HIV testing rates were low. Online interventions are needed to engage individuals with diverse GM identities in India for linkage to accessible and acceptable HIV testing options.

Intersectional stigma and gender non-affirmation hinder HIV care engagement among transgender women living with HIV in India.

Among transgender women living with HIV (TGWLH) in India, little is understood about the mechanisms through which multiple intersecting stigmas impact HIV care engagement, or intervention strategies that might mitigate this impact. We conducted focus groups with TGWLH (N = 30) in three Indian cities and analysed data using theoretical frameworks related to HIV stigma, gender affirmation, and syndemics. Findings revealed that enacted and anticipated stigma due to transgender identity, HIV, or sex work status, and lack of gender affirmation (e.g., misgendering) in healthcare settings delayed ART initiation and promoted care disengagement. Having supportive physicians and counsellors within ART centres and peer outreach workers facilitated ART initiation, adherence, and retention. Findings also revealed that HIV stigma within TGW communities led to concealment of HIV status or syndemic conditions such as depression and alcohol use, thereby affecting care engagement. However, the TGW community itself was also described as a resilience resource, offering emotional, psychological and tangible support that decreased the impact of discrimination on care engagement. HIV care engagement efforts among Indian TGWLH could be strengthened by reducing intersecting stigmas in healthcare settings and within TGW communities, providing gender-affirming and culturally competent healthcare, addressing psychosocial syndemic conditions, and strengthening support within transgender communities.

Collaborative PrEP Implementation Strategies for Latino Men Who have Sex with Men: A Health Center-Community Consensus Process.

Community-based organizations (CBOs) deliver services in culturally-responsive ways, and could effectively partner with health centers to deliver HIV pre-exposure prophylaxis (PrEP) to Latino men who have sex with men (LMSM). However, few such models exist. We conducted a planning study in collaboration with three CBOs serving LMSM to identify optimal PrEP delivery strategies for health centers and CBOs to implement jointly. We established a Community Expert Panel (CEP) of eight client-facing CBO and health center staff. Over 6 months, the panel met monthly to identify collaborative strategies for PrEP delivery, using a modified Delphi method consisting of the following steps: (1) brainstorming strategies; (2) rating strategies on acceptability, appropriateness and feasibility; (3) review of data from qualitative focus group discussions with CBO clients; and (4) final strategy selection. The panel initially identified 25 potential strategies spread across three categories: improving communication between health centers and CBOs; using low-barrier PrEP options (e.g. telemedicine), and developing locally-relevant, culturally-sensitive outreach materials. Focus groups with CBO clients highlighted a desire for flexible options for PrEP-related care and emphasized trust in CBOs. The final package of strategies consisted of: (1) a web-based referral tool; (2) telemedicine appointments; (3) geographically-convenient options for lab specimen collection; (4) tailored print and social media; and (5) regular coaching sessions with CBO staff. Through a community-engaged process, we identified a package of PrEP delivery strategies that CBOs and health centers can implement in partnership, which have the potential to overcome barriers to PrEP for LMSM.

'There are people like me who will see that, and it will just wash over them': Black sexual minority men's perspectives on messaging in PrEP visual advertisements.

The high incidence of HIV among US Black sexual minority men is a public health crisis that pre-exposure prophylaxis (PrEP) for HIV can help address. Public health campaigns, which often include pictures of Black sexual minority men alongside PrEP-related messaging, have been developed to encourage PrEP awareness and uptake. However, the acceptability of the messaging within these campaigns among Black sexual minority men is unclear. We conducted four focus groups with 18 HIV-negative Black sexual minority men in Washington, DC to explore their perspectives regarding promotional messaging (textual elements) in PrEP visual advertisements, including their reactions to three large-scale public health campaigns. Primary themes included: (1) the need for additional information about PrEP, (2) preference for slogan simplicity, (3) the desire to normalise PrEP use, and (4) mixed views on the inclusion of condoms. Results indicated that the messaging in current PrEP visual advertisements may not sufficiently address Black sexual minority men's questions about PrEP. Providing basic PrEP information and methods to access more information; using simple, unambiguous language; presenting PrEP use in a destigmatising, normalising fashion; and conveying the relevance of condoms if included in the advertisement could help increase the acceptability of future PrEP advertising among Black sexual minority men.

Awareness and Acceptability of Undetectable = Untransmittable Among a U.S. National Sample of HIV-Negative Sexual and Gender Minorities.

While the "Undetectable = Untransmittable" (U=U) message is widely endorsed, little is known about its breadth and reach. Our study describes socio-demographic characteristics and sexual behaviors associated with having heard of and trusting in U =U in a U.S. national sample of HIV-negative participants. Data were derived from the Together 5,000 cohort study, an internet-based U.S. national cohort of cis men, trans men and trans women who have sex with men. Approximately 6 months after enrollment, participants completed an optional survey included in the present cross-sectional analysis (n = 3286). Measures included socio-demographic and healthcare-related characteristics; questions pertaining to knowledge of and trust in U=U (dependable variable). We used descriptive statistics and multivariable logistic models to identify characteristics associated with these variables and explored patterns in willingness to engage in condomless anal sex (CAS) with regard to trust in U=U. In total, 85.5% of participants reported having heard of U=U. Among those aware of U=U, 42.3% indicated they trusted it, 19.8% did not, and 38.0% were unsure about it. Latinx, Asian, lower income, and Southern participants were less likely to have heard of U=U. Having had a recent clinical discussion about PrEP or being a former-PrEP user were associated with trust in U=U. Willingness to engage in CAS was positively associated with trust in U=U, and varied based on the partner's serostatus, PrEP use and viral load. Although we found high rates of awareness and low levels of distrust, our study indicated that key communities remain unaware and/or skeptical of U=U.

RESUMEN: Mientras que el mensaje de "Indetectable=Intransmisible" (I=I) es ampliamente respaldado, poco se conoce acerca de su alcance y amplitud. Nuestro estudio describe características socio-demográficas y los comportamientos sexuales asociados con haber escuchado de y confiar en I=I en una muestra nacional Estadounidense de participantes VIH-negativos. Los datos se derivaron de Together 5,000, un estudio cohorte en donde se recopiló datos de un cohorte basado en internet de hombres cis, hombres trans y mujeres trans que tienen sexo con otros hombres. Aproximadamente 6 meses después de la inscripción, los participantes completaron una encuesta opcional cuyos datos son presentados en este análisis transversal (n = 3286). Los instrumentos incluyeron características socio-demografías y relacionadas al cuidado de la salud; preguntas pertinentes al conocimiento de y confianza en I=I (variable dependiente). Usamos estadísticas descriptivas y modelos logísticos multivariables para identificar características asociadas a estas variables y exploramos los patrones en la disposición a participar de sexo anal sin condones (CAS) con respecto a la confianza en I=I. En total, 85.5% de los participantes reportaron haber escuchado de I=I. Entre esos, 42.3% indicó que confiaban en el mensaje, 19.8% no confiaban, y 38.0% estaban inseguros. Los participantes latinx, asiáticos, de bajos recursos y del sur tenían menos probabilidad de haber escuchado de I=I. El haber tenido una discusión clínica reciente sobre PrEP o el ser un ex usuario de PrEP se asociaron con la confianza en I=I. La disposición a participar de CAS se asoció positivamente con la confianza en I=I, y varió en función del estado serológico de las parejas, el uso de PrEP y la carga viral. Aunque encontramos altas tasas de conciencia y bajos niveles de desconfianza, nuestro estudio indicó que comunidades clave siguen sin conocer y/o escépticas de I=I.

Factors Associated with Being PrEP-Naïve Among a U.S. National Cohort of Former-PrEP and PrEP-Naïve Participants Meeting Objective Criteria for PrEP Care.

There is an urgent need to increase uptake and persistence in HIV pre-exposure prophylaxis (PrEP) in PrEP-eligible candidates. Little is known about the similarities and differences between groups of PrEP-naïve and former users, an important consideration for future interventions. We explored factors associated with being PrEP-naïve in a U.S. national cohort of naïve and former-PrEP users, all of whom met objective criteria for PrEP care at enrollment. Data were derived from the Together 5000 cohort study, an Internet-based U.S. national cohort of cisgender and trans men and trans women who have sex with men. Participants were recruited via ads on men-for-men geosocial networking apps. All participants were not on PrEP at the time of enrollment. We conducted bivariate analysis to explore differences between the two groups and used multivariable logistic regression to assess factors associated with being PrEP-naïve. Of the 6283 participants, 5383 (85.7%) were PrEP-naïve and 900 (14.3%) were former-PrEP users. There were significant differences between PrEP-naïve and former-PrEP users across multiple demographic variables, in addition to PrEP-related and psychosocial variables. Factors associated with being PrEP-naïve included younger age, sexual identity other than gay/queer, lower perception of candidacy for PrEP care, less willingness to take PrEP, lower access to PrEP care, and individual-level barriers such as health- and provider-related concerns. Programs and policies designed to address uptake and persistence of PrEP should be aware of these differences. Providing care in non-traditional LGBTQ-care settings, home-based PrEP interventions, and provision by healthcare providers other than physicians could improve uptake. Future research should investigate mechanisms that can improve uptake and persistence in communities in need of PrEP.

Demographic, Behavioral, and Geographic Differences Between Men, Transmen, and Transwomen Currently on PrEP, Former PrEP Users, and Those Having Never Used PrEP.

Many recent studies have compared men currently taking pre-exposure prophylaxis (PrEP) to men not taking PrEP. However, less is known about demographic, behavioral, and geographic characteristics of men formerly, but not currently, taking PrEP. Using a 2017-2018 U.S. national, internet-based sample (n = 10,504) of men, transmen, and transwomen who have sex with men, we compared three groups based on their PrEP experiences. Results highlight individual-level financial and geo-contextual barriers to PrEP use that can inform prevention efforts to improve PrEP initiation and continuation for both PrEP-naïve and PrEP-experienced individuals, respectively.

PrEP in the Real World: Predictors of 6-Month Retention in a Diverse Urban Cohort.

The effectiveness of HIV pre-exposure prophylaxis (PrEP) depends on adherence, which requires retention in PrEP care. We sought to examine factors associated with six-month retention in PrEP care among individuals prescribed PrEP between 2011 and 2015 in a large, academic health system in the Bronx, New York. We used multivariable logistic regression to identify factors independently associated with six-month retention. Among 107 patients, retention at 6 months was 42%. In the multivariable analysis, heterosexual individuals were less likely to be retained in PrEP care at 6 months, but individuals who received prescriptions from attending physicians were more likely to be retained in care. Larger prospective studies are needed to better evaluate the individual and health system factors associated with long-term engagement in PrEP care.

Prevalence of and Factors Associated with the Use of HIV Serosorting and Other Biomedical Prevention Strategies Among Men Who Have Sex with Men in a US Nationwide Survey.

PrEP and treatment-as-prevention (TasP) are biomedical strategies to reduce HIV transmission. Some men who have sex with men (MSM) are combining biomedical strategies with HIV serosorting-termed "biomed matching" when both partners are either on PrEP or TasP, or "biomed sorting" when one partner is using PrEP and the other TasP. Nevertheless, there is limited data on the extent of biomed matching/sorting in large geographically diverse samples. In 2016-2017, 5021 MSM from across the US were surveyed about their HIV status and HIV viral load/PrEP use, as well as that of their recent casual male partners. For each participant, we calculated the proportion of his partners who were (1) HIV-positive and undetectable, (2) HIV-positive and detectable/unknown, (3) HIV unknown/undiscussed, (4) HIV-negative on PrEP, (5) HIV-negative, not on PrEP. In total, 66.6% (n = 3346) of participants were HIV-negative and not on PrEP, 11.9% (n = 599) on PrEP, 14.1% (n = 707) HIV-positive and undetectable, 1.1% (n = 55) HIV-positive and viral load detectable/unknown, and 6.2% (n = 313) HIV unsure/unknown. A participant's own HIV and PrEP status/was significantly associated with that of his partners (all p < 0.001), evincing evidence of both serosorting and biomed matching. Among men on PrEP and those who were HIV-undetectable, there was also some evidence to suggest these participants dually engaged in biomed matching as well as biomed sorting. We found evidence of biomed matching and sorting, which may compound its effectiveness for those using it (i.e., both partners bring biomedical protection). Unintended consequences of biomed matching/sorting include that men not using a biomedical strategy may be less likely to benefit from a partner's use of the strategy-potentially further driving disparities in HIV infections. Public health campaigns might be well served to highlight not only the benefits that biomedical HIV prevention strategies provide for their users (e.g., "being on PrEP protects me from getting HIV"), but also the benefits that a user brings to his partners (e.g., "my use of PrEP means my partners won't get HIV"), and the benefits of being with a partner who is using a biomedical strategy (e.g., "my partner's use of PrEP/TasP protects me from HIV").

The Use of Online Posts to Identify Barriers to and Facilitators of HIV Pre-exposure Prophylaxis (PrEP) Among Men Who Have Sex with Men: A Comparison to a Systematic Review of the Peer-Reviewed Literature.

Pre-exposure prophylaxis (PrEP) remains an under-utilized HIV prevention tool among men who have sex with men (MSM). To more comprehensively elucidate barriers and facilitators to PrEP use among US MSM, we conducted a systematic review of peer-reviewed published articles and content analysis of online posts about PrEP. We searched peer-reviewed databases (Medline, Web of Science, Google Scholar) using MESH headings and keywords about PrEP and/or HIV prevention from 2005 to 2015. We included original studies among MSM in the US that reported on barriers, facilitators, or other factors related to PrEP use. We also searched online posts and associated comments (news articles, opinion pieces, blogs and other social media posts) in diverse venues (Facebook, Slate Outward, Huffington Post Gay Voices, Queerty, and My PrEP Experience blog) to identify posts about PrEP. We used content analysis to identify themes and compare potential differences between the peer-reviewed literature and online posts. We identified 25 peer-reviewed articles and 28 online posts meeting inclusion criteria. We identified 48 unique barriers and 46 facilitators to using PrEP. These 94 themes fit into six overarching categories: (1) access (n = 14), (2) attitudes/beliefs (n = 24), (3) attributes of PrEP (n = 13), (4) behaviors (n = 11), (5) sociodemographic characteristics (n = 8), and (6) social network (n = 6). In all categories, analysis of online posts resulted in identification of a greater number of unique themes. Thirty-eight themes were identified in the online posts that were not identified in the peer-reviewed literature. We identified barriers and facilitators to PrEP in online posts that were not identified in a systematic review of the peer-reviewed literature. By incorporating data both from a systematic review of peer-reviewed articles and from online posts, we have identified salient and novel information about barriers to and facilitators of PrEP use. Traditional research approaches may not comprehensively capture current factors important for designing and implementing PrEP related interventions.

A Cross-Sectional Online Survey of HIV Pre-Exposure Prophylaxis Adoption Among Primary Care Physicians.

BACKGROUND: Among health care providers, prescription of HIV pre-exposure prophylaxis (PrEP) has been low. Little is known specifically about primary care physicians (PCPs) with regard to PrEP awareness and adoption (i.e., prescription or referral), and factors associated with adoption. OBJECTIVE: To assess PrEP awareness, PrEP adoption, and factors associated with adoption among PCPs. DESIGN: Cross-sectional online survey conducted in April and May 2015. RESPONDENTS: Members of a national professional organization for academic primary care physicians (n = 266). MAIN MEASURES: PrEP awareness, PrEP adoption (ever prescribed or referred a patient for PrEP [yes/no]), provider and practice characteristics, and self-rated knowledge, attitudes, and beliefs associated with adoption. KEY RESULTS: The survey response rate was 8.6 % (266/2093). Ninety-three percent of respondents reported prior awareness of PrEP. Of these, 34.9 % reported PrEP adoption. In multivariable analysis of provider and practice characteristics, compared with non-adopters, adopters were more likely to provide care to more than 50 HIV-positive patients (vs. 0, aOR = 6.82, 95 % CI 2.06-22.52). Compared with non-adopters, adopters were also more likely to report excellent, very good, or good self-rated PrEP knowledge (15.1 %, 33.7 %, 30.2 % vs. 2.5 %, 18.1 %, 23.8 %, respectively; p < 0.001) and to perceive PrEP as extremely safe (35.1 % vs. 10.7 %; p = 0.002). Compared with non-adopters, adopters were less likely to perceive PrEP as being moderately likely to increase risk behaviors ("risk compensation") (12.8 % vs. 28.8 %, p = 0.02). CONCLUSIONS: While most respondents were aware of PrEP, only one-third of PrEP-aware PCPs reported adoption. Adopters were more likely to have experience providing HIV care and to perceive PrEP as extremely safe, and were less likely to perceive PrEP use as leading to risk compensation. To enhance PCP adoption of PrEP, educational efforts targeting PCPs without HIV care experience should be considered, as well as training those with HIV care experience to be PrEP "clinical champions". Concerns about safety and risk compensation must also be addressed.

Reaching Key Populations: PrEP Uptake in an Urban Health Care System in the Bronx, New York.

Pre-exposure prophylaxis (PrEP) has been established as an effective HIV prevention tool, but real world studies are limited. To inform dissemination efforts, we sought to describe individuals prescribed PrEP in the largest health care system in the Bronx, New York, an urban region with a high burden of HIV. We used a clinical database and chart review to identify individuals prescribed PrEP between 2011 and 2015 (n = 108). A majority were Black and Hispanic, half were men who have sex with men, and nearly a third were cisgender women who have sex with men. Primary care settings were the most common site of PrEP prescription and PrEP prescription rates increased over time. Despite reaching a diverse patient population, PrEP prescribing rates were low, underscoring the urgent need for PrEP scale-up.

Pre-exposure prophylaxis prescribing and retention in care among heterosexual women at a community-based comprehensive sexual health clinic.

In the United States, heterosexual women account for 20% of new HIV infections. As a user-controlled HIV prevention method, pre-exposure prophylaxis (PrEP) has substantial potential to reduce new infections among women. However, among women, PrEP is vastly underutilized. To guide efforts to increase women-at-risk's PrEP use, we sought to describe the characteristics of women prescribed PrEP as well as their retention in PrEP care. We conducted a chart review of women who received care at a comprehensive sexual health clinic within a large urban health care system. Referral sources included the health care system's clinics and HIV testing program, as well as local community-based organizations. From 1 December 2014 to 5 August 2016, 554 women received care at the clinic. During this period, 21 heterosexual women (3.8%) received at least one prescription for daily oral PrEP. For women prescribed PrEP, median age was 35 years old (range: 20-52). The majority (66.7%) were either Latina or non-Latina Black and most (81.2%) had public health insurance. The most common PrEP indication was being in a known sero-discordant partnership (85.7%). Of women in such partnerships, 83.3% reported their male partner was currently taking antiretroviral medications (ARVs) and 16.7% reported trying to conceive with their partner (not mutually exclusive). Of women with ARV-using partners, 66.7% reported that their partners were virally suppressed. Retention in PrEP care at three months was 61.1% and, at six months, 37.5%. Further study is necessary to expand PrEP to women whose risk factors extend beyond being in a known sero-discordant partnership, and to understand the reasons for the observed drop-off in PrEP care visits in real-world settings.

Emerging from the database shadows: characterizing undocumented immigrants in a large cohort of HIV-infected persons.

Little is known about how HIV affects undocumented immigrants despite social and structural factors that may place them at risk of poor HIV outcomes. Our understanding of the clinical epidemiology of HIV-infected undocumented immigrants is limited by the challenges of determining undocumented immigration status in large data sets. We developed an algorithm to predict undocumented status using social security number (SSN) and insurance data. We retrospectively applied this algorithm to a cohort of HIV-infected adults receiving care at a large urban healthcare system who attended at least one HIV-related outpatient visit from 1997 to 2013, classifying patients as "screened undocumented" or "documented". We then reviewed the medical records of screened undocumented patients, classifying those whose records contained evidence of undocumented status as "undocumented per medical chart" (charted undocumented). Bivariate measures of association were used to identify demographic and clinical characteristics associated with undocumented immigrant status. Of 7593 patients, 205 (2.7%) were classified as undocumented by the algorithm. Compared to documented patients, undocumented patients were younger at entry to care (mean 38.5 years vs. 40.6 years, p < 0.05), less likely to be female (33.2% vs. 43.1%, p < 0.01), less likely to report injection drug use as their primary HIV risk factor (3.4% vs. 18.0%, p < 0.001), and had lower median CD4 count at entry to care (288 vs. 339 cells/mm3, p < 0.01). After medical record review, we re-classified 104 patients (50.7%) as charted undocumented. Demographic and clinical characteristics of charted undocumented did not differ substantially from screened undocumented. Our algorithm allowed us to identify and clinically characterize undocumented immigrants within an HIV-infected population, though it overestimated the prevalence of patients who were undocumented.