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

Individual provider Internal Medicine Physician · NPI 1184624637

Dr. Brian Martin Sebastian, MD is an Internal Medicine in Sonoma, California. Graduated from Duke University School of Medicine in 1997, 29 years ago. Practices with Regents Univ of California UCSF, a 272-clinician group and offers telehealth. Licensed in California.

Years since qualifying
29
Trained at
Duke University School of Medicine
Licensed in
CA
In the registry since
2005
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

651 1st St W Ste H
Sonoma, CA 95476-7045
Phone: (707) 938-3870
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A92199 (CA)

Record details

NPI number1184624637
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 27, 2005
Last updated in NPPESFebruary 7, 2013

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolDUKE UNIVERSITY SCHOOL OF MEDICINE
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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