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

Peter Barmon Brett, MD

Individual provider Medical Oncology Physician · NPI 1487743472

Peter Barmon Brett, MD is a Hematology/Oncology in Santa Rosa, California. Graduated from Stanford University School of Medicine in 1985, 41 years ago. Practices with Commonwealth Healthcare Corporation, a 80-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
41
Trained at
Stanford University School of Medicine
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.

See every abbreviation used in this directory →

Practice location Address checks out

3883 Airway Dr # 220
Santa Rosa, CA 95403-1670
Phone: (707) 521-7750
Show map & directions

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

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence G59321 (CA)
Medical Oncology Physician Taxonomy 207RX0202X · Licence G59321 (CA)
Hematology (Internal Medicine) Physician Taxonomy 207RH0000X · Licence G59321 (CA)

Record details

NPI number1487743472
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 11, 2006
Last updated in NPPESMarch 7, 2023
Mailing address2350 W El Camino Real Fl 2, Mountain View, CA 94040-6203

Medicare enrollment

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

Medicare specialtyHEMATOLOGY/ONCOLOGY
Medical schoolSTANFORD UNIVERSITY SCHOOL OF MEDICINE
Graduated 1985 (41 years in practice)
Group practice Commonwealth Healthcare Corporation — 80 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Santa Rosa