Mosen Istwani, MD
NPI 1043229453ActiveIndividual· Internal Medicine, Nephrology· Riverside, CA
Internal Medicine, Nephrology (MD) with Riverside Nephrology Physicians Inc, practicing in Riverside, California. In 2024 Medicare paid $101,298 for 147 patients, and Part D covered 345 of their prescriptions, 84% of them generic. Akebia Therapeutics Inc was the largest of 7 companies reporting payments in 2025, $263.38 in all, mostly food and beverage. Lists Corona Regional Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1043229453 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 5, 2006 |
| Last updated in NPPES | Mar 21, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | A64871 | CA |
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 (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 147 |
|---|---|
| Services billed | 1,325 across 13 procedure codes |
| Paid by Medicare | $101,298 |
Part D prescriptions in 2024
| Prescriptions (claims) | 345 · 564 30-day fills |
|---|---|
| Patients | 44 |
| Total drug cost | $44,744 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 1990 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Nephrology |
Medical group
- Riverside Nephrology Physicians IncPerris, CA · 3 clinicians
Hospital affiliations
- Corona Regional Medical CenterCorona, CA
- Parkview Community Hospital Medical CenterRiverside, CA
- Riverside Community HospitalRiverside, CA
Industry payments (Open Payments)
- 2025$263.38 · 12 payments from 7 companies
- 2024$297.09 · 14 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Akebia Therapeutics Inc | $106.49 | 5 |
| Travere Therapeutics, Inc. | $39.76 | 2 |
| Otsuka America Pharmaceutical, Inc. | $31.14 | 1 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $29.90 | 1 |
| Novartis Pharmaceuticals Corporation | $20.35 | 1 |
What the 2025 payments were for
- Food and Beverage$263.38 · 12 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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