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

Dr. Peter James Mazolewski, MD

Individual provider Specialist · NPI 1710076773

Dr. Peter James Mazolewski, MD is a General Surgery in Walnut Creek, California. Graduated from University of Southern California Keck School of Medicine in 1994, 32 years ago. Practices with Bass Medical Group, a 292-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
32
Trained at
University of Southern California Keck School of Medicine
Licensed in
CA
In the registry since
2006
Specialties on file
2
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

365 Lennon Ln Ste 290
Walnut Creek, CA 94598-5915
Phone: (925) 658-5076
Fax: (925) 658-5089
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Surgery Physician (primary) Taxonomy 208600000X · Licence A84094 (CA)
Specialist Taxonomy 174400000X · Licence A84094 (CA)

Record details

NPI number1710076773
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 11, 2006
Last updated in NPPESFebruary 26, 2025
Certification dateFebruary 26, 2025

Medicare enrollment

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

Medicare specialtyGENERAL SURGERY
Medical schoolUNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE
Graduated 1994 (32 years in practice)
Group practice Bass Medical Group — 292 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Walnut Creek