William Michael Whalen II, M.D.
NPI 1912386871ActiveIndividual· Internal Medicine, Pulmonary Disease· Worcester, MA
Internal Medicine, Pulmonary Disease (M.D.) with Umass Memorial Medical Group Inc, practicing in Worcester, Massachusetts. Their prescriptions cost Medicare Part D more than their services did: $995,665 for 1,110 claims, against $47,397 paid for services in 2024. Astrazeneca Pharmaceuticals LP reported $123.09 in payments in 2025, mostly food and beverage. Lists Umass Memorial Health - Harrington Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1912386871 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | May 26, 2015 |
| Last updated in NPPES | Jun 5, 2025 |
| Certified by provider | Jun 5, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | 273430 | MA |
| Internal Medicine, Critical Care Medicine | 207RC0200X | 273430 | 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) | Enrolled Practitioner - Pulmonary Disease (MA); Practitioner - Pulmonary Disease (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 222 |
|---|---|
| Services billed | 451 across 39 procedure codes |
| Paid by Medicare | $47,397 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,110 · 1,278 30-day fills |
|---|---|
| Patients | 159 |
| Total drug cost | $995,665 |
Education and affiliations
| Graduation year | 2015 |
|---|---|
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Critical Care (Intensivists) |
| Telehealth | Offers telehealth |
Medical group
- Umass Memorial Medical Group IncWorcester, MA · 2,516 clinicians
Hospital affiliations
- Umass Memorial Health - Harrington HospitalSouthbridge, MA
- Umass Memorial Healthalliance HospitalsLeominster, MA
- Umass Memorial Medical Center/University CampusWorcester, MA
Industry payments (Open Payments)
- 2025$123.09 · 1 payment from 1 company
- 2024$91.50 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $123.09 | 1 |
What the 2025 payments were for
- Food and Beverage$123.09 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 46 pulmonologists in Worcester · All pulmonologists in Massachusetts