Diana Chan, M.D.
NPI 1235399288ActiveIndividual· Internal Medicine· Berkeley Heights, NJ
Internal Medicine (M.D.) in Berkeley Heights, New Jersey, trained at Rutgers R W Johnson Medical School (Cam/New Bruns/Pisc) (class of 2008). In 2024 Medicare paid $38,193 for 249 patients, and Part D covered 414 of their prescriptions, 84% of them generic. Pfizer Inc. was the largest of 2 companies reporting payments in 2025, $41.80 in all, mostly food and beverage.
Overview
| NPI | 1235399288 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jun 12, 2008 |
| Last updated in NPPES | Sep 23, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 25MA08988900 | 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 | 249 |
|---|---|
| Services billed | 479 across 23 procedure codes |
| Paid by Medicare | $38,193 |
Part D prescriptions in 2024
| Prescriptions (claims) | 414 · 799 30-day fills |
|---|---|
| Patients | 149 |
| Total drug cost | $56,898 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | Rutgers R W Johnson Medical School (Cam/New Bruns/Pisc) |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Internal Medicine |
Medical group
- Practice Associates Medical GroupSummit, NJ · 1,408 clinicians
Hospital affiliations
- Morristown Medical CenterMorristown, NJ
- Overlook Medical CenterSummit, NJ
Other facilities
- Atlantic Visiting NurseHospice · Morristown, NJ
Industry payments (Open Payments)
- 2025$41.80 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $22.80 | 1 |
| Otsuka America Pharmaceutical, Inc. | $19.00 | 1 |
What the 2025 payments were for
- Food and Beverage$41.80 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 32 internal medicine physicians in Berkeley Heights · All internal medicine physicians in New Jersey