Peter James Mazolewski, M.D.
NPI 1710076773ActiveIndividual· Surgery· Walnut Creek, CA
Surgery (M.D.) in Walnut Creek, California, trained at University of Southern California Keck School of Medicine (class of 1994). Mostly services rather than prescriptions: Medicare paid $94,052 for 162 patients in 2024, with only 28 Part D claims. Intuitive Surgical, Inc. was the largest of 4 companies reporting payments in 2025, $16,996 in all, mostly education.
Overview
| NPI | 1710076773 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 11, 2006 |
| Last updated in NPPES | Feb 26, 2025 |
| Certified by provider | Feb 26, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | A84094 | CA |
| Specialist | 174400000X | A84094 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - General Surgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 162 |
|---|---|
| Services billed | 387 across 67 procedure codes |
| Paid by Medicare | $94,052 |
Part D prescriptions in 2024
| Prescriptions (claims) | 28 · 28 30-day fills |
|---|---|
| Patients | 17 |
| Total drug cost | $99.01 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 1994 |
| Medicare specialty | General Surgery |
Medical group
- Bass Medical GroupChico, CA · 291 clinicians
Hospital affiliations
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
Industry payments (Open Payments)
- 2025$16,996 · 39 payments from 4 companies
- 2024$1,462 · 15 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $16,407 | 34 |
| Davol Inc. | $369.55 | 3 |
| Canon Medical Systems USA, Inc. | $200.64 | 1 |
| Octapharma USA, Inc. | $18.50 | 1 |
What the 2025 payments were for
- Education$14,016 · 11 payments
- Food and Beverage$1,717 · 22 payments
- Travel and Lodging$1,264 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other general surgeons in Walnut Creek
- 1013169911
- 1124280672
- 1336427939
- 1346628740
- 1366628935
- 1447468236
- 1467554337
- 1467611244
- 1619239852
- 1659455103
- 1750347100
- 1780843185
All 46 general surgeons in Walnut Creek · All general surgeons in California