Riad Y. Darwish, M.D.
NPI 1366459208ActiveIndividual· Internal Medicine, Nephrology· Whittier, CA
Internal Medicine, Nephrology (M.D.) in Whittier, California, licensed in CA, with an NPI issued in August 2006. Their prescriptions cost Medicare Part D more than their services did: $52,683 for 720 claims, against $18,508 paid for services in 2024. Amgen Inc. reported $17.05 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1366459208 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 2, 2006 |
| Last updated in NPPES | May 17, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | A36607 | CA |
| Internal Medicine | 207R00000X | A36607 | CA |
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 (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 70 |
|---|---|
| Services billed | 225 across 9 procedure codes |
| Paid by Medicare | $18,508 |
Part D prescriptions in 2024
| Prescriptions (claims) | 720 · 1,556 30-day fills |
|---|---|
| Patients | 88 |
| Total drug cost | $52,683 |
| Generic share | 88% of claims |
Industry payments (Open Payments)
- 2025$17.05 · 1 payment from 1 company
- 2024$141.10 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $17.05 | 1 |
What the 2025 payments were for
- Food and Beverage$17.05 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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