Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Tat S. Lam, MD

Individual provider Family Medicine Physician · NPI 1134288749

Tat S. Lam, MD is a Family Practice in Orange, California. Graduated from University of Southern California Keck School of Medicine in 1995, 31 years ago. Practices with Providence Medical Foundation, a 1,465-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
31
Trained at
University of Southern California Keck School of Medicine
Licensed in
CA
In the registry since
2006
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

2501 E Chapman Ave Ste 204
Orange, CA 92869-3204
Phone: (714) 628-3230
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 15855 Pomona Rincon Rd Bldg 4, Chino Hills, CA 91709-3162 — (909) 929-2511
  • 2251 N Harbor Blvd, Fullerton, CA 92835-2601 — (714) 449-6230

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence A62418 (CA)

Record details

NPI number1134288749
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 8, 2006
Last updated in NPPESApril 1, 2022
Certification dateApril 1, 2022
Mailing address200 W Center Street Promenade Ste 300, Anaheim, CA 92805-3960

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolUNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE
Graduated 1995 (31 years in practice)
Group practice Providence Medical Foundation — 1465 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

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