Mark Stewart Amster, MD
NPI 1518947068ActiveIndividual· Dermatology· Brighton, MA
Dermatology (MD) in Brighton, Massachusetts, trained at State University of New York Downstate Medical Center (class of 1987). Their prescriptions cost Medicare Part D more than their services did: $904,476 for 980 claims, against $231,536 paid for services in 2024. Galderma Laboratories, L.P. was the largest of 18 companies reporting payments in 2025, $7,945 in all, mostly speaking and faculty fees.
Overview
| NPI | 1518947068 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 19, 2006 |
| Last updated in NPPES | Jul 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | 70448 | 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 - Dermatology (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 910 |
|---|---|
| Services billed | 5,683 across 56 procedure codes |
| Paid by Medicare | $231,536 |
Part D prescriptions in 2024
| Prescriptions (claims) | 980 · 1,107 30-day fills |
|---|---|
| Patients | 430 |
| Total drug cost | $904,476 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | State University of New York Downstate Medical Center |
|---|---|
| Graduation year | 1987 |
| Medicare specialty | Dermatology |
Medical groups
- Newton Watertown Dermatology Assoc. PCBrighton, MA · 4 clinicians
- Mark Amster DermBrighton, MA · 3 clinicians
Industry payments (Open Payments)
- 2025$7,945 · 121 payments from 18 companies
- 2024$10,227 · 116 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Galderma Laboratories, L.P. | $4,356 | 7 |
| Novartis Pharmaceuticals Corporation | $1,337 | 8 |
| Ucb, Inc. | $529.75 | 21 |
| Abbvie Inc. | $385.49 | 19 |
| Janssen Biotech, Inc. | $236.61 | 14 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$4,200 · 2 payments
- Food and Beverage$2,906 · 116 payments
- Travel and Lodging$838.69 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Dermatology providers in Brighton
- 1265941082
- 1760028872
- 1376385054
- 1356988844
- 1558477869
- 1104995133