Marcia Gina C. Castro, MD
NPI 1407934789ActiveIndividual· Internal Medicine· Wilmington, DE
Internal Medicine (MD) with First State Medical Associates, practicing in Wilmington, Delaware. Their prescriptions cost Medicare Part D more than their services did: $1,619,006 for 11,265 claims, against $97,146 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 18 companies reporting payments in 2025, $2,011 in all, mostly food and beverage. Lists Christiana Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1407934789 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 2, 2006 |
| Last updated in NPPES | May 29, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | C10006460 | DE |
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 (DE) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 256 |
|---|---|
| Services billed | 1,150 across 15 procedure codes |
| Paid by Medicare | $97,146 |
Part D prescriptions in 2024
| Prescriptions (claims) | 11,265 · 24,727 30-day fills |
|---|---|
| Patients | 573 |
| Total drug cost | $1,619,006 |
| Generic share | 83% of claims |
Education and affiliations
| Graduation year | 1993 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- First State Medical AssociatesWilmington, DE · 3 clinicians
Hospital affiliations
- Christiana HospitalNewark, DE
- St Francis HospitalWilmington, DE
Other facilities
- Bayada Home Health Care, IncHome health agency · Wilmington, DE
- Christianacare HomehealthHome health agency · Wilmington, DE
Industry payments (Open Payments)
- 2025$2,011 · 106 payments from 18 companies
- 2024$3,335 · 158 payments from 21 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $405.44 | 26 |
| Novo Nordisk Inc | $271.13 | 17 |
| Lilly USA, LLC | $217.15 | 6 |
| Pfizer Inc. | $182.42 | 13 |
| Glaxosmithkline, LLC. | $158.74 | 9 |
What the 2025 payments were for
- Food and Beverage$2,011 · 106 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 156 internal medicine physicians in Wilmington · All internal medicine physicians in Delaware