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

Mary Anne O'Callaghan, MD

Individual provider Family Medicine Physician · NPI 1932489408

Mary Anne O'Callaghan, MD is a Family Medicine Physician in El Segundo, California. Licensed in California. Registered with an NPI since 2011.

Licensed in
CA
In the registry since
2011
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

845 Maryland St
El Segundo, CA 90245-2546
Phone: (310) 640-9604
Show map & directions

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

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence AFE19605 (CA)

Record details

NPI number1932489408
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 27, 2011
Last updated in NPPESAugust 27, 2011

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