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MedStar Health – MedStar Union Memorial Hospital
STD/STI testing location in Baltimore, Maryland.
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: 3333 N Calvert St, Ste 670, Baltimore, MD 21218
Get directions
Phone: (410) 554-4501
Website: https://www.medstarhealth.org/doctor/dr-calvin-thomas-williams-jr-md/
Tests listed
- Chlamydia Test
- Conventional HIV Test
- Gonorrhea Test
- Hepatitis A Test
- Hepatitis B Test
- Hepatitis C Test
- Herpes Test
- Rapid HIV Test
- Syphilis Test
- TB Test
Cost and payment
Medicare Accepted, Fee, Insurance Accepted.
Hours
Hours not listed. Call before visiting.
Appointment required: Yes
Other services
STI treatment, PrEP (HIV prevention medicine).
Languages: English
Type: Clinic
Source: CDC NPIN listing. Last updated by source: 2026-08-11. Page built 2026-11-03.
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