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

Margaret Mahaffa

Individual provider Emergency Medicine Physician · NPI 1215557426

Margaret Mahaffa is an Emergency Medicine in Walnut Creek, California. Qualified in 2020, 6 years ago. Practices with Permanente Medical Group Inc, a 10,941-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
6
Licensed in
CA
In the registry since
2020
Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1425 S Main St
Walnut Creek, CA 94596-5318
Phone: (925) 295-4000
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

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

Additional practice locations (1)

  • 77 Goodell St, Buffalo, NY 14203-1243 — (716) 645-9707

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence A186494 (CA)

Record details

NPI number1215557426
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorNo
NPI enumeratedApril 17, 2020
Last updated in NPPESAugust 2, 2023
Certification dateAugust 2, 2023

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 2020 (6 years in practice)
Group practice Permanente Medical Group Inc — 10941 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Other providers in Walnut Creek