William Bryan Rivera, M.D
NPI 1447498985ActiveIndividual· Surgery· Apple Valley, CA
Surgery (M.D) in Apple Valley, California, trained at New York Medical College (class of 2003). 249 Medicare patients in 2024, $149,017 paid; all of their 212 Part D prescriptions were generic. Madrigal Pharmaceuticals was the largest of 2 companies reporting payments in 2025, $238.80 in all, mostly food and beverage.
Overview
| NPI | 1447498985 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D |
| Sole proprietor | Yes |
| NPI issued | Jan 21, 2009 |
| Last updated in NPPES | Mar 22, 2024 |
| Certified by provider | Mar 22, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | A 111003 | CA |
| General Acute Care Hospital | 282N00000X | — | — |
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 - Colorectal Surgery (Proctology) (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 249 |
|---|---|
| Services billed | 1,193 across 77 procedure codes |
| Paid by Medicare | $149,017 |
Part D prescriptions in 2024
| Prescriptions (claims) | 212 · 212 30-day fills |
|---|---|
| Patients | 124 |
| Total drug cost | $6,014 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | New York Medical College |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Colorectal Surgery (Proctology) |
| Secondary specialties | General Surgery |
Hospital affiliation
- Providence St Mary Medical CenterApple Valley, CA
Industry payments (Open Payments)
- 2025$238.80 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $146.83 | 1 |
| Elucent Medical | $91.97 | 1 |
What the 2025 payments were for
- Food and Beverage$238.80 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 19 general surgeons in Apple Valley · All general surgeons in California