Daniel O'Leary, M.D.
NPI 1447346531ActiveIndividual· Internal Medicine· Leominster, MA
Internal Medicine (M.D.) in Leominster, Massachusetts, trained at University of Massachusetts Medical School (class of 1985). Their prescriptions cost Medicare Part D more than their services did: $1,169,792 for 16,274 claims, against $252,844 paid for services in 2024. Novo Nordisk Inc was the largest of 2 companies reporting payments in 2025, $51.30 in all, mostly food and beverage.
Overview
| NPI | 1447346531 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 5, 2006 |
| Last updated in NPPES | Feb 28, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 57335 | 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 - Internal Medicine (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 768 |
|---|---|
| Services billed | 2,692 across 34 procedure codes |
| Paid by Medicare | $252,844 |
Part D prescriptions in 2024
| Prescriptions (claims) | 16,274 · 39,030 30-day fills |
|---|---|
| Patients | 1,239 |
| Total drug cost | $1,169,792 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | University of Massachusetts Medical School |
|---|---|
| Graduation year | 1985 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Leominster Medical AssociatesLeominster, MA · 2 clinicians
Hospital affiliations
- Emerson Hospital -W Concord, MA
- Heywood Hospital -Gardner, MA
- Marlborough HospitalMarlborough, MA
- Umass Memorial Healthalliance HospitalsLeominster, MA
- Umass Memorial Medical Center/University CampusWorcester, MA
Other facilities
- Bayada Home Health Care, IncHome health agency · Marlborough, MA
- Better Care Home Health and Hospice, Inc.Home health agency · Leominster, MA
- CaretendersHome health agency · Needham Heights, MA
- Health Alliance Home Health and HospiceHome health agency · Leominster, MA
- Vna Care NetworkHome health agency · Worcester, MA
Industry payments (Open Payments)
- 2025$51.30 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $29.92 | 1 |
| Glaxosmithkline, LLC. | $21.38 | 1 |
What the 2025 payments were for
- Food and Beverage$51.30 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 41 internal medicine physicians in Leominster · All internal medicine physicians in Massachusetts