Arnel C. Castrence, M.D.
NPI 1225092968ActiveIndividual· Internal Medicine· Waldorf, MD
Internal Medicine (M.D.) in Waldorf, Maryland, trained at University of Maryland School of Medicine (class of 1995). Their prescriptions cost Medicare Part D more than their services did: $501,596 for 4,524 claims, against $99,743 paid for services in 2024. Amgen Inc. was the largest of 10 companies reporting payments in 2025, $297.24 in all, mostly food and beverage.
Overview
| NPI | 1225092968 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 12, 2006 |
| Last updated in NPPES | Aug 18, 2026 |
| Certified by provider | Aug 18, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | D53592 | MD |
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 (DC); Practitioner - Internal Medicine (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 387 |
|---|---|
| Services billed | 2,299 across 43 procedure codes |
| Paid by Medicare | $99,743 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,524 · 9,953 30-day fills |
|---|---|
| Patients | 397 |
| Total drug cost | $501,596 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | University of Maryland School of Medicine |
|---|---|
| Graduation year | 1995 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Medstar Medical Group - Southern Maryland LLCHollywood, MD · 245 clinicians
Other facilities
- Medstar Health Home CareHome health agency · Hyattsville, MD
Industry payments (Open Payments)
- 2025$297.24 · 13 payments from 10 companies
- 2024$131.68 · 5 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $66.52 | 2 |
| Astrazeneca Pharmaceuticals LP | $40.56 | 2 |
| Abbvie Inc. | $36.16 | 2 |
| Tactile Systems Technology Inc | $30.55 | 1 |
| Neurocrine Biosciences, Inc. | $24.43 | 1 |
What the 2025 payments were for
- Food and Beverage$297.24 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 51 internal medicine physicians in Waldorf · All internal medicine physicians in Maryland