Mark D. Johnson, MD PHD
NPI 1578501797ActiveIndividual· Neurological Surgery· Worcester, MA
Neurological Surgery (MD PHD) in Worcester, Massachusetts, trained at Harvard Medical School (class of 1995). Medicare paid $43,080 for services to 127 patients in 2024. Depuy Synthes Sales Inc. reported $18.63 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1578501797 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD PHD |
| Sole proprietor | No |
| NPI issued | Jun 2, 2006 |
| Last updated in NPPES | Oct 26, 2020 |
| Certified by provider | Oct 26, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Neurological Surgery Primary | 207T00000X | 217384 | MA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Neurosurgery (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 127 |
|---|---|
| Services billed | 234 across 24 procedure codes |
| Paid by Medicare | $43,080 |
Education and affiliations
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 1995 |
| Medicare specialty | Neurosurgery |
| Telehealth | Offers telehealth |
Medical group
- Umass Memorial Medical Group IncWorcester, MA · 2,516 clinicians
Hospital affiliations
- Milford Regional Medical CenterMilford, MA
- Umass Memorial Health - Harrington HospitalSouthbridge, MA
- Umass Memorial Healthalliance HospitalsLeominster, MA
- Umass Memorial Medical Center/University CampusWorcester, MA
Industry payments (Open Payments)
- 2025$18.63 · 1 payment from 1 company
- 2024$346.92 · 6 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Depuy Synthes Sales Inc. | $18.63 | 1 |
What the 2025 payments were for
- Food and Beverage$18.63 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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