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Public Health Seattle and King County – Downtown Public Health Center
STD/STI testing location in Seattle, Washington.
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: 2124 4th Ave, Seattle, WA 98121
Get directions
Phone: (206) 447-8300
Website: https://www.kingcounty.gov/depts/health/locations/downtown.aspx
Tests listed
- Conventional HIV Test
- Hepatitis A Test
- Hepatitis B Test
- Hepatitis C Test
- Rapid HIV Test
- Syphilis Test
Cost and payment
Medicaid Accepted, Fee, Insurance Accepted, Free STI Test, Free HIV Test, Free Hepatitis C Test, Free Hepatitis B Test.
This location lists free STI and/or HIV testing. Eligibility rules may apply.
Hours
| Monday | 9:00am – 5:00pm |
| Tuesday | 1:00pm – 5:00pm |
| Wednesday | 9:00am – 5:00pm |
| Thursday | 9:00am – 5:00pm |
| Friday | 9:00am – 5:00pm |
Appointment required: No (walk-ins may be accepted)
Other services
STI treatment.
Languages: English, Interpretation Services Available for Non-English Languages
Type: Public Health Department/Social Services Department
Source: CDC NPIN listing. Last updated by source: 2026-09-12. Page built 2026-11-03.