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

Donald Widder

Individual provider Family Medicine Physician · NPI 1033287529

Donald Widder is a Diagnostic Radiology in Martinez, California. Graduated from Stanford University School of Medicine in 1975, 51 years ago. Practices with Modesto Radiological Medical Group Inc, a 97-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
51
Trained at
Stanford University School of Medicine
Licensed in
CA
In the registry since
2006
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Practice location Address checks out

2500 Alhambra Ave
Martinez, CA 94553-3156
Phone: (925) 370-5110
Fax: (925) 370-5142
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence G55185 (CA)

Record details

NPI number1033287529
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedDecember 1, 2006
Last updated in NPPESMay 21, 2013
Mailing address50 Douglas Dr, Suite 391, Martinez, CA 94553-4098

Medicare enrollment

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

Medicare specialtyDIAGNOSTIC RADIOLOGY
Medical schoolSTANFORD UNIVERSITY SCHOOL OF MEDICINE
Graduated 1975 (51 years in practice)
Group practice Modesto Radiological Medical Group Inc — 97 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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