Warren J. Gasper, M.D.
NPI 1427186212ActiveIndividual· Surgery· San Francisco, CA
Surgery (M.D.) in San Francisco, California, trained at University of Maryland School of Medicine (class of 2003). Medicare paid $36,346 for services to 417 patients in 2024. W. L. Gore & Associates, Inc. was the largest of 4 companies reporting payments in 2025, $512.16 in all, mostly food and beverage.
Overview
| NPI | 1427186212 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 1, 2007 |
| Last updated in NPPES | Jun 30, 2026 |
| Certified by provider | Jun 30, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | A89802 | CA |
| Surgery, Vascular Surgery | 2086S0129X | A89802 | 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 - Vascular Surgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 417 |
|---|---|
| Services billed | 876 across 45 procedure codes |
| Paid by Medicare | $36,346 |
Education and affiliations
| Medical school | University of Maryland School of Medicine |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Vascular Surgery |
| Telehealth | Offers telehealth |
Medical groups
- UCSF Medical Group Business ServicesSan Francisco, CA · 1,598 clinicians
- UCSF Dept of SurgerySan Francisco, CA · 215 clinicians
Hospital affiliation
- UCSF Medical CenterSan Francisco, CA
Industry payments (Open Payments)
- 2025$512.16 · 9 payments from 4 companies
- 2024$2,208 · 13 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| W. L. Gore & Associates, Inc. | $273.68 | 5 |
| Shockwave Medical, Inc | $125.70 | 1 |
| Abbott Laboratories | $79.97 | 2 |
| Medtronic, Inc. | $32.81 | 1 |
What the 2025 payments were for
- Food and Beverage$512.16 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 231 general surgeons in San Francisco · All general surgeons in California