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

William James Demartini, MD

Individual provider Diagnostic Radiology Physician · NPI 1427091016

William James Demartini, MD is a Diagnostic Radiology in Greenbrae, California. Qualified in 1973, 53 years ago. Practices with California Advanced Imaging Medical Associates Inc, a 82-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
53
Licensed in
CA
In the registry since
2006
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

250 Bon Air Rd
Greenbrae, CA 94904-1702
Phone: (415) 925-7301
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Diagnostic Radiology Physician (primary) Taxonomy 2085R0202X · Licence G27905 (CA)

Record details

NPI number1427091016
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 13, 2006
Last updated in NPPESApril 26, 2010

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolOTHER
Graduated 1973 (53 years in practice)
Group practice California Advanced Imaging Medical Associates Inc — 82 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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