John Seneka Rajapakse, M.D.
NPI 1639377914ActiveIndividual· Internal Medicine· Perth Amboy, NJ
Internal Medicine (M.D.) in Perth Amboy, New Jersey, licensed in NJ, with an NPI issued in July 2007. Their prescriptions cost Medicare Part D more than their services did: $1,007,171 for 13,211 claims, against $52,351 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 17 companies reporting payments in 2025, $1,563 in all, mostly food and beverage. Lists Jfk University Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1639377914 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jul 6, 2007 |
| Last updated in NPPES | Nov 26, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 25MA08277300 | 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 - Internal Medicine (NJ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 136 |
|---|---|
| Services billed | 749 across 14 procedure codes |
| Paid by Medicare | $52,351 |
Part D prescriptions in 2024
| Prescriptions (claims) | 13,211 · 14,930 30-day fills |
|---|---|
| Patients | 332 |
| Total drug cost | $1,007,171 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 2003 |
|---|---|
| Medicare specialty | Internal Medicine |
Hospital affiliations
- Jfk University Medical CenterEdison, NJ
- Raritan Bay Medical CenterPerth Amboy, NJ
Other facilities
- Hackensack Meridian Jfk at HomeHome health agency · Iselin, NJ
- Spring Creek Healthcare CenterNursing home · Perth Amboy, NJ
Industry payments (Open Payments)
- 2025$1,563 · 75 payments from 17 companies
- 2024$1,034 · 66 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $391.02 | 26 |
| Abbvie Inc. | $320.99 | 9 |
| Pfizer Inc. | $214.75 | 9 |
| Axsome Therapeutics, Inc. | $147.68 | 3 |
| Lilly USA, LLC | $87.17 | 5 |
What the 2025 payments were for
- Food and Beverage$1,563 · 75 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 41 internal medicine physicians in Perth Amboy · All internal medicine physicians in New Jersey