Claes M. Nilsson, MD
NPI 1912006065ActiveIndividual· Internal Medicine· Dedham, MA
Internal Medicine (MD) in Dedham, Massachusetts, trained at Yale University School of Medicine (class of 1973). 422 Medicare patients in 2024, $56,168 paid; nearly all of their 1,926 Part D prescriptions were generic (94%).
Overview
| NPI | 1912006065 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 22, 2006 |
| Last updated in NPPES | Oct 19, 2022 |
| Certified by provider | Oct 18, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 53091 | 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 | 422 |
|---|---|
| Services billed | 853 across 13 procedure codes |
| Paid by Medicare | $56,168 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,926 · 1,992 30-day fills |
|---|---|
| Patients | 162 |
| Total drug cost | $68,714 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | Yale University School of Medicine |
|---|---|
| Graduation year | 1973 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Hematology/Oncology |
Medical group
- Vantage Healthcare LLCCanton, MA · 76 clinicians
Other facilities
- CaretendersHome health agency · Needham Heights, MA
- Good Shepherd Community CareHospice · Newton, MA
- Sherrill HouseNursing home · Boston, 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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