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

Bonni S. Massa, MD

Individual provider Obstetrics & Gynecology Physician · NPI 1508933607

Bonni S. Massa, MD is an Obstetrics/Gynecology in Petaluma, California. Graduated from Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University in 1997, 29 years ago. Practices with Regents Univ of California UCSF, a 272-clinician group, works from 2 locations and offers telehealth. Licensed in California.

Years since qualifying
29
Trained at
Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University
Licensed in
CA
In the registry since
2006
Specialties on file
3
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

1496 Professional Dr Ste 603
Petaluma, CA 94954-6698
Phone: (628) 336-5260
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2100 Webster St, San Francisco, CA 94115-2373 — (415) 923-3123

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence A67511 (CA)
Gynecology Physician Taxonomy 207VG0400X · Licence A67511 (CA)
Obstetrics Physician Taxonomy 207VX0000X · Licence A67511 (CA)

Record details

NPI number1508933607
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 30, 2006
Last updated in NPPESOctober 22, 2024
Certification dateOctober 21, 2024
Mailing address2100 Webster St, Suite 319, San Francisco, CA 94115-2373

Medicare enrollment

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

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolCLVLND CLINIC LERNER COLLEGE OF MED OF CASE WSTN RSV UNIVERSITY
Graduated 1997 (29 years in practice)
Group practice Regents Univ Of California Ucsf — 272 clinicians
Accepts Medicare assignment Not indicated
TelehealthOffers telehealth services

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