Ann Chen, PA
NPI 1750358438ActiveIndividual· Physician Assistant· Prince Frederick, MD
Physician Assistant (PA) with Medstar Medical Group - Southern Maryland LLC, practicing in Prince Frederick, Maryland. Their prescriptions cost Medicare Part D more than their services did: $573,081 for 762 claims, against $49,809 paid for services in 2024. Janssen Biotech, Inc. was the largest of 11 companies reporting payments in 2025, $817.31 in all, mostly food and beverage. Lists Calverthealth Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1750358438 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA |
| Sole proprietor | No |
| NPI issued | Mar 2, 2006 |
| Last updated in NPPES | Aug 18, 2026 |
| Certified by provider | Aug 18, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | C0004921 | MD |
| Physician Assistant | 363A00000X | 1711-023 | WI |
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 | 252 |
|---|---|
| Services billed | 724 across 19 procedure codes |
| Paid by Medicare | $49,809 |
Part D prescriptions in 2024
| Prescriptions (claims) | 762 · 1,689 30-day fills |
|---|---|
| Patients | 198 |
| Total drug cost | $573,081 |
| Generic share | 78% of claims |
Education and affiliations
| Graduation year | 2003 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Medstar Medical Group - Southern Maryland LLCHollywood, MD · 245 clinicians
Hospital affiliations
- Calverthealth Medical CenterPrince Frederick, MD
- Medstar Saint Mary's HospitalLeonardtown, MD
Industry payments (Open Payments)
- 2025$817.31 · 27 payments from 11 companies
- 2024$515.45 · 25 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $193.93 | 6 |
| Madrigal Pharmaceuticals | $172.26 | 4 |
| Boston Scientific Corporation | $144.00 | 1 |
| Abbvie Inc. | $106.85 | 6 |
| Pfizer Inc. | $50.04 | 3 |
What the 2025 payments were for
- Food and Beverage$817.31 · 27 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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