Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mark P. Clark, MD

Individual provider Internal Medicine Physician · NPI 1891874665

Mark P. Clark, MD practises Internal Medicine in Glendale, California. Graduated from Loyola University of Chicago, Stritch School of Medicine in 1982, 44 years ago. Practices with City and County of San Francisco, a 369-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
44
Trained at
Loyola University of Chicago, Stritch School of Medicine
Licensed in
CA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3746 Foothill Blvd # B140
Glendale, CA 91214-1740
Phone: (310) 445-5999
Fax: (323) 544-4248
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 840 Irving St, San Francisco, CA 94122-2311 — (888) 663-6331

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G50527 (CA)
Hospitalist Physician Taxonomy 208M00000X · Licence G50527 (CA)

Record details

NPI number1891874665
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 3, 2006
Last updated in NPPESNovember 18, 2025
Certification dateNovember 18, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Also practisesGENERAL SURGERY
Medical schoolLOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE
Graduated 1982 (44 years in practice)
Group practice City And County Of San Francisco — 369 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Removal of tissue 15 times · 66th percentile
Removal of skin lesions 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Laguna Honda Hospital & Rehabilitation Center Hospital · San Francisco, CA

Colleagues at City and County of San Francisco

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 369 clinicians in the practice; 12 are shown here.

Other providers in Glendale