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Project ARK Washington University
STD/STI testing location in St. Louis, Missouri.
Verify with the clinic before visiting. Hours, services, fees and appointment rules change. Call ahead to confirm. This directory is for information only and is not medical advice. In an emergency, call 911.
Address: 4169 Laclede Ave, 2nd Fl, St. Louis, MO 63108
Get directions
Phone: (314) 535-7275
Website: https://projectark.wustl.edu/
Tests listed
- HIV Self-Test
- Hepatitis C Test
- Rapid HIV Test
- Syphilis Test
Cost and payment
No Fee, Free HIV Test, Free HIV Self-Test, Free Hepatitis C Test, PrEP for uninsured, Free STI Test.
This location lists free STI and/or HIV testing. Eligibility rules may apply.
Hours
| Monday | 1:00pm – 4:30pm |
| Tuesday | 1:00pm – 4:30pm |
| Wednesday | 1:00pm – 4:30pm |
| Thursday | 1:00pm – 4:30pm |
| Friday | 1:00pm – 4:30pm |
Appointment required: Yes
Other services
STI treatment, PrEP (HIV prevention medicine).
Languages: English, Interpretation Services Available for Non-English Languages
Type: AIDS Service Organization
Source: CDC NPIN listing. Last updated by source: 2026-10-27. Page built 2026-11-03.