Michael C. Zaslow, M.D.
NPI 1588662985ActiveIndividual· Internal Medicine· Winchester, MA
Internal Medicine (M.D.) in Winchester, Massachusetts, trained at Harvard Medical School (class of 1977). Their prescriptions cost Medicare Part D more than their services did: $331,311 for 2,106 claims, against $74,165 paid for services in 2024.
Overview
| NPI | 1588662985 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jul 9, 2005 |
| Last updated in NPPES | Jun 2, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 48969 | 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 | 320 |
|---|---|
| Services billed | 877 across 24 procedure codes |
| Paid by Medicare | $74,165 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,106 · 4,583 30-day fills |
|---|---|
| Patients | 138 |
| Total drug cost | $331,311 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 1977 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Pulmonary Disease |
| Telehealth | Offers telehealth |
Hospital affiliations
- Beth Israel Deaconess Medical CenterBoston, MA
- Lahey Hospital & Medical Center, BurlingtonBurlington, MA
- Melrosewakefield HealthcareMelrose, MA
- Winchester HospitalWinchester, MA
Other facilities
- Beth Israel Lahey Health at HomeHome health agency · Beverly, 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 33 internal medicine physicians in Winchester · All internal medicine physicians in Massachusetts