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 / HI

JOHN J KOO, MD

INTERNAL MEDICINE

Graduated: 2003

NPI: 1477617561

Practice Locations (1)

640 ULUKAHIKI ST

KAILUA, HI 967344454

8082636500

Source: CMS National Downloadable File, September 2026.