Alan S. Gellerstein, M.D.
NPI 1588695712ActiveIndividual· Family Medicine· Cedar Knolls, NJ
Family Medicine (M.D.) in Cedar Knolls, New Jersey, trained at Eastern Virginia Medical School (class of 1996). Their prescriptions cost Medicare Part D more than their services did: $643,268 for 6,463 claims, against $173,610 paid for services in 2024. Novo Nordisk Inc was the largest of 17 companies reporting payments in 2025, $1,563 in all, mostly food and beverage.
Overview
| NPI | 1588695712 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 5, 2006 |
| Last updated in NPPES | Jun 12, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 25MA06879300 | 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 - Family Practice (NJ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 495 |
|---|---|
| Services billed | 3,521 across 55 procedure codes |
| Paid by Medicare | $173,610 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,463 · 14,609 30-day fills |
|---|---|
| Patients | 700 |
| Total drug cost | $643,268 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Eastern Virginia Medical School |
|---|---|
| Graduation year | 1996 |
| Medicare specialty | Family Practice |
| Telehealth | Offers telehealth |
Medical group
- Practice Associates Medical GroupSummit, NJ · 1,408 clinicians
Hospital affiliations
- Ahs Hospital CorpHackettstown, NJ
- Chilton Medical CenterPompton Plains, NJ
- Morristown Medical CenterMorristown, NJ
- Overlook Medical CenterSummit, NJ
Other facilities
- Atlantic Visiting NurseHome health agency · Morristown, NJ
- Visiting Nurse Assoc of Northern New Jersey, IncHome health agency · Morristown, NJ
- Atlantic Visiting NurseHospice · Morristown, NJ
- Kessler Rehab CenterInpatient rehabilitation facility · West Orange, NJ
Industry payments (Open Payments)
- 2025$1,563 · 130 payments from 17 companies
- 2024$1,674 · 116 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $251.11 | 20 |
| Pfizer Inc. | $191.82 | 38 |
| Corcept Therapeutics | $190.50 | 13 |
| Abbvie Inc. | $181.54 | 14 |
| Glaxosmithkline, LLC. | $171.19 | 12 |
What the 2025 payments were for
- Food and Beverage$1,563 · 130 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Family Medicine providers in Cedar Knolls
- 1164371985
- 1528098076
- 1073555686
- 1205222437
- 1376588558
- 1386105906
- 1053815050
- 1548694862
- 1760778633
- 1679346514