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

Dr. Margaret M Shannon, MD

Individual provider Dermatology Physician · NPI 1265449441

Dr. Margaret M Shannon, MD is a Dermatology in Costa Mesa, California. Graduated from Georgetown University School of Medicine in 1979, 47 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in California.

Years since qualifying
47
Trained at
Georgetown University School of Medicine
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

275 Victoria St Ste 1H
Costa Mesa, CA 92627-1906
Phone: (949) 646-2311
Fax: (949) 646-1064
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Dermatology Physician (primary) Taxonomy 207N00000X · Licence G42251 (CA)

Record details

NPI number1265449441
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 1, 2006
Last updated in NPPESAugust 5, 2010

Medicare enrollment

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

Medicare specialtyDERMATOLOGY
Medical schoolGEORGETOWN UNIVERSITY SCHOOL OF MEDICINE
Graduated 1979 (47 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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