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

MARIANNE K RYAN, MD

GENERAL SURGERY

Medical school: UNIVERSITY OF WASHINGTON SCHOOL OF MEDICINE

Graduated: 1989

NPI: 1336216183

Practice Locations (2)

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP

25821 VERMONT AVE

HARBOR CITY, CA 907103518

3103255111

SOUTHERN CALIFORNIA PERMANENTE MEDICAL GROUP

25825 VERMONT AVE

HARBOR CITY, CA 907103518

3103255111

Source: CMS National Downloadable File, September 2026.

MARIANNE RYAN, MD | HealthCareAtlasUSA