HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / CA

MARK WILLIAMS, MD

NEPHROLOGY

Medical school: INDIANA UNIVERSITY SCHOOL OF MEDICINE

Graduated: 1977

Offers telehealth

NPI: 1184653891

Practice Locations (8)

USC CARE MEDICAL NON-CONTRACTED LLC

300 W HUNGTINGTON DR

ARCADIA, CA 910073402

6268988000

USC CARE MEDICAL NON-CONTRACTED LLC

1441 EASTLAKE AVE

LOS ANGELES, CA 900890112

3238653000

USC CARE MEDICAL NON-CONTRACTED LLC

1500 SAN PABLO ST

LOS ANGELES, CA 900335313

3234428444

USC CARE MEDICAL NON-CONTRACTED LLC

1516 SAN PABLO ST

LOS ANGELES, CA 900335313

3232764701

USC CARE MEDICAL NON-CONTRACTED LLC

2310 ALCAZAR ST

LOS ANGELES, CA 900335327

3234419966

HARVARD MEDICAL FACULTY PHYS AT BETH ISRAEL DEACONESS MED CTR INC

330 BROOKLINE AVE

Boston, MA 022155400

HARVARD MEDICAL FACULTY PHYS AT BETH ISRAEL DEACONESS MED CTR INC

330 BROOKLINE AVE

BOSTON, MA 022155400

6177548612

JOSLIN CLINIC INC

1 JOSLIN PL

BOSTON, MA 022155306

6177322400

Source: CMS National Downloadable File, September 2026.

MARK WILLIAMS, MD | HealthCareAtlasUSA