Jason Grunes, M.D.
NPI 1619131539ActiveIndividual· Internal Medicine· Braintree, MA
Internal Medicine (M.D.) with Jason Grunes PLLC, practicing in Braintree, Massachusetts. 626 Medicare patients in 2024, $545,704 paid; nearly all of their 2,102 Part D prescriptions were generic (92%). Lists Winchester Hospital as a hospital affiliation.
Overview
| NPI | 1619131539 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 10, 2008 |
| Last updated in NPPES | Apr 24, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 248248 | 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 | 626 |
|---|---|
| Services billed | 6,294 across 5 procedure codes |
| Paid by Medicare | $545,704 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,102 · 2,161 30-day fills |
|---|---|
| Patients | 546 |
| Total drug cost | $85,456 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 2008 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Jason Grunes PLLCWoburn, MA · 4 clinicians
Hospital affiliation
- Winchester HospitalWinchester, MA
Other facilities
- Encompass Health Rehabilitation Hosp of New EnglanInpatient rehabilitation facility · Woburn, MA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 39 internal medicine physicians in Braintree · All internal medicine physicians in Massachusetts