William Allen Rumack, M.D.
NPI 1740257542ActiveIndividual· Orthopaedic Surgery· West Hills, CA
Orthopaedic Surgery (M.D.) in West Hills, California, trained at University of Colorado School of Medicine, Denver (class of 1996). 473 Medicare patients in 2024, $257,913 paid; all of their 452 Part D prescriptions were generic. Fidia Pharma USA Inc. reported $13.84 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1740257542 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Mar 1, 2006 |
| Last updated in NPPES | May 11, 2023 |
| Certified by provider | May 11, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery Primary | 207X00000X | A79561 | CA |
| Orthopaedic Surgery | 207X00000X | K2785 | TX |
| Orthopaedic Surgery | 207X00000X | DR38255 | CO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Orthopedic Surgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 473 |
|---|---|
| Services billed | 14,216 across 104 procedure codes |
| Paid by Medicare | $257,913 |
Part D prescriptions in 2024
| Prescriptions (claims) | 452 · 488 30-day fills |
|---|---|
| Patients | 199 |
| Total drug cost | $3,184 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | University of Colorado School of Medicine, Denver |
|---|---|
| Graduation year | 1996 |
| Medicare specialty | Orthopedic Surgery |
Medical group
- Professional Orthopedics Medical Associates A Prof Medical CorpWest Hills, CA · 3 clinicians
Hospital affiliation
- UCLA West Valley Medical CenterWest Hills, CA
Other facilities
- Ensure Home Health Care, IncHome health agency · Canoga Park, CA
Industry payments (Open Payments)
- 2025$13.84 · 1 payment from 1 company
- 2024$58.19 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Fidia Pharma USA Inc. | $13.84 | 1 |
What the 2025 payments were for
- Food and Beverage$13.84 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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