William B. Holgerson, MD
NPI 1356445829ActiveIndividual· Internal Medicine· Wellesley, MA
Internal Medicine (MD) in Wellesley, Massachusetts, trained at University of Massachusetts Medical School (class of 1975). Their prescriptions cost Medicare Part D more than their services did: $418,212 for 5,335 claims, against $139,138 paid for services in 2024. Pfizer Inc. was the largest of 3 companies reporting payments in 2025, $109.37 in all, mostly food and beverage.
Overview
| NPI | 1356445829 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 12, 2006 |
| Last updated in NPPES | Jun 26, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | MA42491 | MA |
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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 342 |
|---|---|
| Services billed | 2,747 across 34 procedure codes |
| Paid by Medicare | $139,138 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,335 · 12,652 30-day fills |
|---|---|
| Patients | 369 |
| Total drug cost | $418,212 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | University of Massachusetts Medical School |
|---|---|
| Graduation year | 1975 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Hospital affiliations
- Beth Israel Deaconess Medical CenterBoston, MA
- Brigham and Women Faulkner HospitalJamaica Plain, MA
- Brigham and Women's HospitalBoston, MA
- Massachusetts General HospitalBoston, MA
- Newton-Wellesley HospitalNewton, MA
Other facilities
- Mass General Brigham Home Care, IncHome health agency · Newton, MA
- Spaulding Rehabilitation HospitalInpatient rehabilitation facility · Charlestown, MA
Industry payments (Open Payments)
- 2025$109.37 · 5 payments from 3 companies
- 2024$73.84 · 4 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $55.79 | 3 |
| Lilly USA, LLC | $29.73 | 1 |
| Exact Sciences Corporation | $23.85 | 1 |
What the 2025 payments were for
- Food and Beverage$109.37 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 96 internal medicine physicians in Wellesley · All internal medicine physicians in Massachusetts