HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / CA

WOO S AHN, MD

INTERNAL MEDICINE

Graduated: 1976

NPI: 1396807806

Practice Locations (2)

20145 PIONEER BLVD

LAKEWOOD, CA 907151051

5629165020

20145 S PIONEER BLVD

LAKEWOOD, CA 907151051

Source: CMS National Downloadable File, September 2026.

WOO AHN, MD | HealthCareAtlasUSA