William L. Diehl, M.D.
NPI 1629068457ActiveIndividual· Surgery, Surgical Oncology· Livingston, NJ
Surgery, Surgical Oncology (M.D.) with Summit Medical Group PA, practicing in Livingston, New Jersey. 322 Medicare patients in 2024, $111,238 paid; nearly all of their 66 Part D prescriptions were generic (98%). Leica Microsystems Inc. reported $18.76 in payments in 2024, mostly food and beverage. Lists Ahs Hospital Corp and 1 other hospital as hospital affiliations.
Overview
| NPI | 1629068457 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 24, 2005 |
| Last updated in NPPES | Feb 16, 2026 |
| Certified by provider | Feb 16, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery, Surgical Oncology Primary | 2086X0206X | 25MA04355800 | NJ |
| Surgery | 208600000X | 25MA04355800 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - General Surgery (NJ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 322 |
|---|---|
| Services billed | 588 across 47 procedure codes |
| Paid by Medicare | $111,238 |
Part D prescriptions in 2024
| Prescriptions (claims) | 66 · 81 30-day fills |
|---|---|
| Patients | 47 |
| Total drug cost | $452.36 |
| Generic share | 98% of claims |
Education and affiliations
| Graduation year | 1981 |
|---|---|
| Medicare specialty | General Surgery |
| Secondary specialties | Surgical Oncology |
Medical group
- Summit Medical Group PABerkeley Heights, NJ · 1,212 clinicians
Hospital affiliations
- Ahs Hospital CorpHackettstown, NJ
- Morristown Medical CenterMorristown, NJ
Other facilities
- Kessler Rehab CenterInpatient rehabilitation facility · West Orange, NJ
Industry payments (Open Payments)
- 2024$18.76 · 1 payment from 1 company
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Leica Microsystems Inc. | $18.76 | 1 |
What the 2024 payments were for
- Food and Beverage$18.76 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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