Karen De Castro Dah, M.D.
NPI 1730467804ActiveIndividual· Internal Medicine, Nephrology· Salisbury, MD
Internal Medicine, Nephrology (M.D.) with Capital Nephrology, PC, practicing in Salisbury, Maryland. In 2024 Medicare paid $207,848 for 495 patients, and Part D covered 651 of their prescriptions, 84% of them generic. Otsuka America Pharmaceutical, Inc. was the largest of 19 companies reporting payments in 2025, $1,427 in all, mostly food and beverage. Lists Adventist Healthcare White Oak Medical Center and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1730467804 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jul 23, 2011 |
| Last updated in NPPES | Jun 19, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | D82637 | 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 - Nephrology (DC); Practitioner - Nephrology (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 495 |
|---|---|
| Services billed | 1,831 across 15 procedure codes |
| Paid by Medicare | $207,848 |
Part D prescriptions in 2024
| Prescriptions (claims) | 651 · 1,494 30-day fills |
|---|---|
| Patients | 124 |
| Total drug cost | $213,040 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 2011 |
|---|---|
| Medicare specialty | Nephrology |
Medical group
- Capital Nephrology, PCChevy Chase, MD · 9 clinicians
Hospital affiliations
- Adventist Healthcare White Oak Medical CenterSilver Spring, MD
- Holy Cross HospitalSilver Spring, MD
- Luminis Health Doctors Community Medical Ctr, IncLanham, MD
- University of MD Capital Region Medical CenterUpper Marlboro, MD
Other facilities
- Capital Region Dialysis Clinic LLCDialysis facility · Landover, MD
- Davita Kidney Care of LargoDialysis facility · Upper Marlboro, MD
- Davita Landover DialysisDialysis facility · Upper Marlboro, MD
- Davita Largo Town Center DialysisDialysis facility · Largo, MD
- Davita Laurel Lakes DialysisDialysis facility · Laurel, MD
Industry payments (Open Payments)
- 2025$1,427 · 70 payments from 19 companies
- 2024$2,019 · 94 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Otsuka America Pharmaceutical, Inc. | $164.84 | 10 |
| Astrazeneca Pharmaceuticals LP | $140.02 | 7 |
| Amgen Inc. | $138.82 | 6 |
| Fresenius USA Marketing, Inc. | $110.74 | 5 |
| Mallinckrodt Hospital Products Inc. | $108.64 | 3 |
What the 2025 payments were for
- Food and Beverage$1,384 · 67 payments
- Education$43.53 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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