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Background Since 1985, all active duty (AD) U.S. military service members have undergone periodic mandatory HIV screening. Subsequent care in the Military Health System (MHS) allows evaluation of clinical outcomes in a setting of open access to healthcare and medications. We describe ART outcomes in HIV-positive AD military utilizing data collected over 15 years in our prospective, multi-center HIV Natural History Study (NHS). Methods We included AD NHS participants diagnosed with HIV from 2002–2016 with ≥1 year of follow-up. Demographics, clinical diagnoses and laboratory data collected at study visits were compared for those on vs. never on ART by HIV diagnosis era at 5-year intervals. Among participants who initiated ART with ≥1 year of follow-up after ART initiation (AI), we assessed rates of virologic suppression (VS) and virologic failure (VF). Results From 2002 to 2016, 1,599 NHS participants were diagnosed with HIV infection; 1,482 had ≥1 year of follow-up. 1,337 (90.2%) received ART; ART recipients were more likely male (OR 2.5 [95% CI 1.2–5.3]), Caucasian (1.6 [1.1–2.3]), older (1.5 per 10 years [1.1–2.0]), diagnosed from 2012–2016 (14.6 [6.6–31.9]), and have lower CD4 counts (0.8 per 100 cells [0.7–0.8]) and higher VL at diagnosis (2.1 [1.8–2.5]). The median time from diagnosis to AI was 0.3 years [0.1–1.3], decreasing by era (P <0.0001). Of those ever on ART, 1,212 (90.7%) had ≥1 year of follow-up on ART; of whom, 1,196 (98.7%) achieved ≥1 measure with VS, 91% on their first regimen and 69% within 6 months. Participants not achieving VS were younger at diagnosis (0.87 per year [0.78–0.98]) and at AI (0.89 per year [0.81–0.98]), were diagnosed in 2002–2011 (9.11 [1.20–69.22]), and had lower CD4 counts at AI (0.50 per 100 cells [0.33–0.75]). 92 (7.7%) had subsequent VF after initial VS. VF was more likely in participants diagnosed in 2002–2006 (3.0 [2.0–4.7]). 281 (23.2%) had an AIDS-defining diagnosis (CD4<200 cells/uL in 88%), which decreased by era (P <0.05). There were 6 deaths in the cohort, all prior to 2012. Conclusion Universal HIV testing and open access to care has resulted in excellent outcomes for AD HIV-positive military members. The MHS model reinforces the benefits of the Department of Health and Human Services’ recommendations for universal testing, linkage to care and ART. Disclosures All authors: No reported disclosures.

1263. Anti-Retroviral (ART) Success in an Active Duty Military Cohort from 2002 to 2016, A Model for Ending the HIV Epidemic in the United States