Kirollos Zaki, D.O
NPI 1104270305ActiveIndividual· Internal Medicine, Nephrology· Riverside, CA
Internal Medicine, Nephrology (D.O) in Riverside, California, trained at Kansas City University of Physicians and Surgeons (class of 2016). Their prescriptions cost Medicare Part D more than their services did: $404,586 for 1,146 claims, against $144,787 paid for services in 2024. Ardelyx, Inc. was the largest of 3 companies reporting payments in 2025, $154.93 in all, mostly food and beverage.
Overview
| NPI | 1104270305 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O |
| Sole proprietor | No |
| NPI issued | Apr 14, 2016 |
| Last updated in NPPES | Sep 2, 2022 |
| Certified by provider | Sep 2, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | 20A16166 | CA |
| Internal Medicine | 207R00000X | 16166 | 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 - Nephrology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 287 |
|---|---|
| Services billed | 1,222 across 20 procedure codes |
| Paid by Medicare | $144,787 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,146 · 2,515 30-day fills |
|---|---|
| Patients | 174 |
| Total drug cost | $404,586 |
| Generic share | 68% of claims |
Education and affiliations
| Medical school | Kansas City University of Physicians and Surgeons |
|---|---|
| Graduation year | 2016 |
| Medicare specialty | Nephrology |
| Secondary specialties | Internal Medicine |
Medical group
- Nephrology Associates Medical Group IncTemecula, CA · 64 clinicians
Hospital affiliation
- Riverside Community HospitalRiverside, CA
Other facilities
- Davita Jurupa Valley DialysisDialysis facility · Jurupa Valley, CA
- Davita Magnolia West DialysisDialysis facility · Riverside, CA
- Davita Riverside Dialysis CenterDialysis facility · Riverside, CA
- Davita Riverside Mission Home TrainingDialysis facility · Riverside, CA
Industry payments (Open Payments)
- 2025$154.93 · 8 payments from 3 companies
- 2024$138.06 · 7 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ardelyx, Inc. | $64.25 | 3 |
| Novo Nordisk Inc | $53.75 | 3 |
| Scpharmaceuticals Inc. | $36.93 | 2 |
What the 2025 payments were for
- Food and Beverage$154.93 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 20 nephrologists in Riverside · All nephrologists in California