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

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1245760578

William Anthony Guerin, MD is a Family Practice in Martinez, California. Graduated from Geisel School of Medicine at Dartmouth in 2017, 9 years ago. Practices with Providence Health and Services Washington, a 31-clinician group and accepts Medicare assignment.

Years since qualifying
9
Trained at
Geisel School of Medicine at Dartmouth
In the registry since
2017
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

2500 Alhambra Ave
Martinez, CA 94553-3156
Phone: (925) 370-5200
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Student in an Organized Health Care Education/Training Program (primary) Taxonomy 390200000X

Record details

NPI number1245760578
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 19, 2017
Last updated in NPPESJuly 21, 2022

Medicare enrollment

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

Medicare specialtyFAMILY PRACTICE
Medical schoolGEISEL SCHOOL OF MEDICINE AT DARTMOUTH
Graduated 2017 (9 years in practice)
Group practice Providence Health And Services Washington — 31 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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