Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1891874665 Individual Practitioner Male Practitioner

Dr. Mark P. Clark , MD

Internal Medicine • Glendale, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Mark Clark, MD is a certified Internal Medicine practicing in Glendale, CA. With approximately 44 years of clinical experience since graduating from Loyola University Of Chicago, Stritch School Of Medicine in 1982, Dr. Clark delivers high-quality medical care to the local community at 3746 FOOTHILL BLVD # B140.

Dr. Clark is affiliated with One Medical Group Inc and accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, urinalysis, manual test. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

3746 Foothill Blvd # B140

Glendale, CA 912141740

Telephone 3104455999
Fax 3235444248
Associated Practice Facility / Clinic

Medicare Profile & Education

Medical School

Loyola University Of Chicago, Stritch School Of Medicine

Graduation Year

1982

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Glendale, CA

Senior Veteran Specialist (>20 Yrs)
Practitioner Clinical Experience
44 Yrs +17.5 yrs vs City Avg
City Avg: 26.5 Yrs
State Avg: 26.6 Yrs
Regional Practice Density
99 Specialists

Practicing in Glendale, CA (18502 Statewide)

Telehealth Adoption Rate
35.4% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
52.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Clark (44 Years) 44 Yrs
Glendale Specialty Average (26.5 Years) 26.5 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2020)
Reporting Year:
HCPCS Code & Description Services Patients Submitted Charge Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes
24 24 $188.00 $89.57

Medical Specialties & State Licenses

CMS Verified: 2025-11-18
Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License CA G50527

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Hospitalist

NUCC Taxonomy Code: 208M00000X

State License CA G50527

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Hospital & Practice Group Affiliations

One Medical Group Inc

840 Irving St, San Francisco, CA 941222311

Phone: 4155906140

Secondary Practice Locations

840 Irving St

San Francisco, CA 941222311

Phone: 8886636331

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

18 Associated Practitioners
Dr. Jason Aguirre , MD

General Practice

NPI 1003200957

Doctor of Medicine (M.D.)

Dr. Gerald Searle , DO

General Practice

NPI 1013148857

Doctor of Osteopathic Medicine (D.O.)

Dr. Aaron Li , MD

General Practice

NPI 1053000992

Doctor of Medicine (M.D.)

NPI 1093102782

Doctor of Medicine (M.D.)

Dr. Kaitlin Buhrke , DO

General Practice

NPI 1124757141

Doctor of Osteopathic Medicine (D.O.)

NPI 1134363377

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

9 Historical Events
🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) November 18, 2025

Internal Medicine (License #G50527 in CA)

📍
Updated Practice Location July 31, 2025

Registered at 3746 FOOTHILL BLVD # B140, GLENDALE, CA 912141740 (Tel: 3104455999)

📍
Updated Business Mailing Address July 31, 2025

Registered at 3746 FOOTHILL BLVD # B140, GLENDALE, CA 912141740 (Tel: 3104455999)

NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍
Updated Practice Location July 08, 2007

Registered at 975 SERENO DR, VALLEJO, CA 945892441 (Tel: 7076511000)

📍
Updated Business Mailing Address July 08, 2007

Registered at 1800 HARRISON ST FL 7, OAKLAND, CA 946123429 (Tel: 5106256262)

👤
Provider Name / Credentials Updated July 08, 2007

Recorded as MARK CLARK, MD

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Hospitalist (License #G50527 in CA)

🟢
Initial NPI Registration & Enumeration November 03, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1891874665
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: November 03, 2006
Last Update: November 18, 2025
Sole Proprietor: No

Mailing Address

3746 Foothill Blvd # B140

Glendale, CA 912141740

Phone: 3104455999

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.