Benjamin Williams Diffenderfer, PA-C
NPI 1679857239ActiveIndividual· Physician Assistant· Bel Air, MD
Physician Assistant (PA-C) with Agape Physical Therapy and Sports Rehabilitation LP and 1 other group, practicing in Bel Air, Maryland. In 2024 Medicare paid $416,483 for 524 patients, and Part D covered 514 of their prescriptions, 71% of them generic. Radius Health, Inc. was the largest of 4 companies reporting payments in 2025, $3,330 in all, mostly honoraria. Lists Umd Upper Chesapeake Medical Center as a hospital affiliation.
Overview
| NPI | 1679857239 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | Yes |
| NPI issued | Sep 30, 2011 |
| Last updated in NPPES | Sep 30, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | C0004567 | MD |
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 - Physician Assistant (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 524 |
|---|---|
| Services billed | 25,418 across 63 procedure codes |
| Paid by Medicare | $416,483 |
Part D prescriptions in 2024
| Prescriptions (claims) | 514 · 940 30-day fills |
|---|---|
| Patients | 196 |
| Total drug cost | $564,358 |
| Generic share | 71% of claims |
Education and affiliations
| Graduation year | 2011 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical groups
- Agape Physical Therapy and Sports Rehabilitation LPForest Hill, MD · 678 clinicians
- Upper Chesapeake Orthopedics, LLCBel Air, MD · 11 clinicians
Hospital affiliation
- Umd Upper Chesapeake Medical CenterBel Air, MD
Industry payments (Open Payments)
- 2025$3,330 · 21 payments from 4 companies
- 2024$2,858 · 11 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Radius Health, Inc. | $2,922 | 10 |
| Amgen Inc. | $322.79 | 8 |
| Baxter Healthcare | $66.42 | 2 |
| Getinge USA Sales, LLC | $18.44 | 1 |
What the 2025 payments were for
- Honoraria$2,100 · 1 payment
- Travel and Lodging$578.89 · 2 payments
- Food and Beverage$475.75 · 17 payments
- Consulting Fee$175.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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