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

Dr. Thomas G Ahn, MD

Individual provider Internal Medicine Physician · NPI 1669556866

Dr. Thomas G Ahn, MD is an Endocrinology in Los Angeles, California. Graduated from Virginia Commonwealth University, School of Medicine in 1979, 47 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in California.

Years since qualifying
47
Trained at
Virginia Commonwealth University, 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

2080 Century Park E Ste 1410
Los Angeles, CA 90067-2017
Phone: (310) 277-7600
Fax: (310) 221-8839
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G61939 (CA)
Endocrinology, Diabetes & Metabolism Physician Taxonomy 207RE0101X · Licence G61939 (CA)

Record details

NPI number1669556866
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 24, 2006
Last updated in NPPESDecember 14, 2025
Certification dateDecember 14, 2025

Medicare enrollment

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

Medicare specialtyENDOCRINOLOGY
Medical schoolVIRGINIA COMMONWEALTH UNIVERSITY, SCHOOL OF MEDICINE
Graduated 1979 (47 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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