Availability of Testing for Sexually Transmitted Infections and HIV in U.S. Outpatient Mental Healthcare Settings.

People with mental illnesses experience higher incidence of sexually transmitted illnesses (STIs) and HIV, and estimates show fewer than 50% have received testing. The purpose of this study was to examine the prevalence of STI/HIV testing among United States outpatient mental healthcare service providers. Data from the National Mental Health Services Survey (NMHSS) was used to determine the rates of STI and HIV testing amongst 9,267 outpatient mental healthcare service providers in the U.S. Regression analyses were used to assess whether the likelihood a service provider offered STI or HIV testing was associated with service provider characteristics (facility type, services offered, accepted payments) and state-level incidence of STIs and HIV. We found 7.79% and 6.64% of outpatient mental healthcare service providers provided STI and HIV testing, respectively, with lowest rates in community mental health centers and partial hospitalization facilities. Providing dual-diagnosis for severe mental illness and substance use disorders was an independent predictor of STI testing (aOR = 2.17, [1.72-2.75] and HIV testing (aOR = 2.61, [2.07-3.30]. Higher state-level incidence of STIs and HIV were associated with higher rates of STI testing (β = 0.28, p = .047) and HIV testing (β = 0.48, p < .001). Preventing STIs and HIV among patients living with mental illness is a key priority of multiple national initiatives. Despite this, fewer than 10% of outpatient mental healthcare service providers responding to the NMHSS offered STI and HIV testing. Existing service co-delivery models may be one promising method for implementing STI/HIV testing within outpatient mental health settings.