Mark S. Diamond, MD
NPI 1073514113ActiveIndividual· Psychiatry & Neurology, Neurology· Morristown, NJ
Psychiatry & Neurology, Neurology (MD) in Morristown, New Jersey, trained at Jefferson Medical College of Thomas Jefferson University (class of 1977). Their prescriptions cost Medicare Part D more than their services did: $1,510,658 for 3,218 claims, against $320,152 paid for services in 2024. Abbvie Inc. was the largest of 23 companies reporting payments in 2025, $1,951 in all, mostly food and beverage.
Overview
| NPI | 1073514113 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Aug 10, 2005 |
| Last updated in NPPES | Aug 11, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Neurology Primary | 2084N0400X | 25MA04056000 | NJ |
| Psychiatry & Neurology, Neurology | 2084N0400X | MA40560 | NJ |
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 - Neurology (NJ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 792 |
|---|---|
| Services billed | 38,693 across 26 procedure codes |
| Paid by Medicare | $320,152 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,218 · 5,863 30-day fills |
|---|---|
| Patients | 513 |
| Total drug cost | $1,510,658 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | Jefferson Medical College of Thomas Jefferson University |
|---|---|
| Graduation year | 1977 |
| Medicare specialty | Neurology |
| Telehealth | Offers telehealth |
Medical group
- Practice Associates Medical GroupSummit, NJ · 1,408 clinicians
Hospital affiliations
- Ahs Hospital CorpHackettstown, NJ
- Morristown Medical CenterMorristown, NJ
- Newton Medical CenterNewton, NJ
- Overlook Medical CenterSummit, NJ
Industry payments (Open Payments)
- 2025$1,951 · 107 payments from 23 companies
- 2024$4,820 · 134 payments from 25 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $300.46 | 21 |
| Pfizer Inc. | $227.28 | 14 |
| Novartis Pharmaceuticals Corporation | $222.58 | 16 |
| Lilly USA, LLC | $169.36 | 4 |
| E.R. Squibb & Sons, L.L.C. | $120.29 | 1 |
What the 2025 payments were for
- Food and Beverage$1,951 · 107 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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