John J. Oppenheimer, MD
NPI 1639170871ActiveIndividual· Allergy & Immunology, Allergy· Cedar Knolls, NJ
Allergy & Immunology, Allergy (MD) in Cedar Knolls, New Jersey, trained at Temple University School of Medicine (class of 1986). In 2024 Medicare paid $342,661 for 308 patients, and Part D covered 1,063 of their prescriptions, 58% of them generic. Glaxosmithkline, LLC. was the largest of 21 companies reporting payments in 2025, $178,177 in all, mostly consulting fees.
Overview
| NPI | 1639170871 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 10, 2005 |
| Last updated in NPPES | May 16, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology, Allergy Primary | 207KA0200X | 25MA05056200 | NJ |
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 - Allergy/Immunology (NJ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 308 |
|---|---|
| Services billed | 9,938 across 22 procedure codes |
| Paid by Medicare | $342,661 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,063 · 1,900 30-day fills |
|---|---|
| Patients | 207 |
| Total drug cost | $441,371 |
| Generic share | 58% of claims |
Education and affiliations
| Medical school | Temple University School of Medicine |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | Allergy/Immunology |
Medical group
- Jeffrey Weiss, M.D., P.A.Riverdale, NJ · 18 clinicians
Hospital affiliation
- Morristown Medical CenterMorristown, NJ
Industry payments (Open Payments)
- 2025$178,177 · 148 payments from 21 companies
- 2024$131,186 · 153 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaxosmithkline, LLC. | $79,776 | 68 |
| Astrazeneca Uk Limited | $76,750 | 8 |
| Novartis Pharmaceuticals Corporation | $11,719 | 10 |
| Astrazeneca Pharmaceuticals LP | $4,316 | 15 |
| Regeneron Healthcare Solutions, Inc. | $3,576 | 5 |
What the 2025 payments were for
- Consulting Fee$143,983 · 29 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$29,194 · 5 payments
- Travel and Lodging$2,632 · 7 payments
- Food and Beverage$2,350 · 106 payments
- Education$19.31 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Allergy & Immunology, Allergy providers in Cedar Knolls
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