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

Woo Sung Ahn, MD

Individual provider Internal Medicine Physician · NPI 1396807806

Woo Sung Ahn, MD is an Internal Medicine in Lakewood, California. Qualified in 1976, 50 years ago. Accepts Medicare assignment. Licensed in California.

Years since qualifying
50
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

20145 S Pioneer Blvd
Lakewood, CA 90715-1051
Phone: (562) 916-5020
Fax: (562) 916-5022
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 A51408 (CA)

Record details

NPI number1396807806
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 14, 2006
Last updated in NPPESJuly 8, 2007
Mailing address20145 S Pioneer Blvd, Lakewood, CA 90715-1051

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1976 (50 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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