William Mullen, MD
NPI 1457362329ActiveIndividual· Internal Medicine, Cardiovascular Disease· Santa Clara, CA
Internal Medicine, Cardiovascular Disease (MD) in Santa Clara, California, trained at Tulane University School of Medicine (class of 1984). Their prescriptions cost Medicare Part D more than their services did: $592,722 for 2,103 claims, against $95,331 paid for services in 2024. Abbott Laboratories was the largest of 3 companies reporting payments in 2025, $72.71 in all, mostly food and beverage.
Overview
| NPI | 1457362329 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 10, 2006 |
| Last updated in NPPES | Oct 22, 2025 |
| Certified by provider | Oct 22, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | A43317 | CA |
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 - Cardiovascular Disease (Cardiology) (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 834 |
|---|---|
| Services billed | 1,505 across 27 procedure codes |
| Paid by Medicare | $95,331 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,103 · 5,067 30-day fills |
|---|---|
| Patients | 368 |
| Total drug cost | $592,722 |
| Generic share | 72% of claims |
Education and affiliations
| Medical school | Tulane University School of Medicine |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Sutter Bay Medical FoundationFremont, CA · 3,829 clinicians
Industry payments (Open Payments)
- 2025$72.71 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbott Laboratories | $36.08 | 2 |
| Regeneron Healthcare Solutions, Inc. | $19.33 | 1 |
| Boston Scientific Corporation | $17.30 | 1 |
What the 2025 payments were for
- Food and Beverage$72.71 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Cardiovascular Disease providers in Santa Clara
- 1861683559
- 1316236078
- 1073976478
- 1871987784
- 1538246475
- 1558629675
- 1578649406
- 1235549460
- 1427137553
- 1386140028
- 1750467684
- 1548310345
All Internal Medicine, Cardiovascular Disease providers in California →