Mark Anthony Castro Cabrera, M.D.
NPI 1659524924ActiveIndividual· Internal Medicine, Nephrology· Spokane, WA
Internal Medicine, Nephrology (M.D.) with Kaiser Foundation Health Plan of the Northwest, practicing in Spokane, Washington. Their prescriptions cost Medicare Part D more than their services did: $210,057 for 2,677 claims, against $7,695 paid for services in 2024. Vantive US Healthcare LLC was the largest of 3 companies reporting payments in 2025, $403.11 in all, mostly food and beverage.
Overview
| NPI | 1659524924 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 29, 2008 |
| Last updated in NPPES | Feb 4, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | MD60545167 | WA |
| Hospitalist | 208M00000X | 2012-00279 | NC |
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 - Nephrology (OR); Practitioner - Nephrology (WA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 19 |
|---|---|
| Services billed | 58 across 14 procedure codes |
| Paid by Medicare | $7,695 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,677 · 7,015 30-day fills |
|---|---|
| Patients | 340 |
| Total drug cost | $210,057 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 2004 |
|---|---|
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- Kaiser Foundation Health Plan of the NorthwestSalem, OR · 1,807 clinicians
Industry payments (Open Payments)
- 2025$403.11 · 4 payments from 3 companies
- 2024$125.00 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Vantive US Healthcare LLC | $150.00 | 1 |
| Nxstage Medical, Inc. | $143.45 | 2 |
| Fresenius USA Marketing, Inc. | $109.66 | 1 |
What the 2025 payments were for
- Food and Beverage$403.11 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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