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 CLARK, MD

INTERNAL MEDICINE

Medical school: LOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE

Graduated: 1982

Also: GENERAL SURGERY

NPI: 1891874665

Practice Locations (2)

CITY AND COUNTY OF SAN FRANCISCO

375 LAGUNA HONDA BLVD

SAN FRANCISCO, CA 941161411

4157592300

ONE MEDICAL GROUP INC

840 IRVING ST

SAN FRANCISCO, CA 941222311

4155906140

Source: CMS National Downloadable File, September 2026.

MARK CLARK, MD | HealthCareAtlasUSA