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

Margaret Riordan, MD

Individual provider Neurological Surgery Physician · NPI 1902061955

Margaret Riordan, MD is a Neurosurgery in San Francisco, California. Graduated from University of Iowa, Rj & L Carver College of Medicine in 2008, 18 years ago. Practices with Alameda Health System, a 601-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California and Pennsylvania.

Years since qualifying
18
Trained at
University of Iowa, Rj & L Carver College of Medicine
Licensed in
CA, PA
In the registry since
2008
Specialties on file
2
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

400 Parnassus Ave
San Francisco, CA 94143-2202
Phone: (415) 472-1000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1000 East Mountain Blvd., Wilkes-Barre, PA 18711-3732 — (570) 808-6026

Specialties & licences

Neurological Surgery Physician (primary) Taxonomy 207T00000X · Licence 137141 (CA)
Neurological Surgery Physician Taxonomy 207T00000X · Licence MD458962 (PA)

Record details

NPI number1902061955
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 18, 2008
Last updated in NPPESMarch 17, 2018

Medicare enrollment

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

Medicare specialtyNEUROSURGERY
Medical schoolUNIVERSITY OF IOWA, RJ & L CARVER COLLEGE OF MEDICINE
Graduated 2008 (18 years in practice)
Group practice Alameda Health System — 601 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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