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

MARGARET SHANNON, MD

DERMATOLOGY

Medical school: GEORGETOWN UNIVERSITY SCHOOL OF MEDICINE

Graduated: 1979

NPI: 1265449441

Practice Locations (2)

275 VICTORIA ST, 1H

COSTA MESA, CA 926271906

400 NEWPORT CTR DR, SUITE 501

NEWPORT BEACH, CA 926607606

9496462311

Source: CMS National Downloadable File, September 2026.

MARGARET SHANNON, MD | HealthCareAtlasUSA