Nayef Mohammed A. Kazzaz, M.D
NPI 1316234693ActiveIndividual· Internal Medicine, Rheumatology· Riverside, CA
Internal Medicine, Rheumatology (M.D) with Arthritis Medical Clinic, practicing in Riverside, California. Their prescriptions cost Medicare Part D more than their services did: $1,638,452 for 850 claims, against $73,368 paid for services in 2024. Amgen Inc. was the largest of 11 companies reporting payments in 2025, $728.52 in all, mostly food and beverage.
Overview
| NPI | 1316234693 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D |
| Sole proprietor | No |
| NPI issued | Jul 7, 2011 |
| Last updated in NPPES | Feb 11, 2021 |
| Certified by provider | Feb 11, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | 51325 | KY |
| Internal Medicine | 207R00000X | 51325 | KY |
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 - Rheumatology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 115 |
|---|---|
| Services billed | 3,817 across 34 procedure codes |
| Paid by Medicare | $73,368 |
Part D prescriptions in 2024
| Prescriptions (claims) | 850 · 1,950 30-day fills |
|---|---|
| Patients | 189 |
| Total drug cost | $1,638,452 |
| Generic share | 64% of claims |
Education and affiliations
| Graduation year | 2010 |
|---|---|
| Medicare specialty | Rheumatology |
Medical group
- Arthritis Medical ClinicRiverside, CA · 4 clinicians
Industry payments (Open Payments)
- 2025$728.52 · 34 payments from 11 companies
- 2024$709.84 · 34 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $231.61 | 16 |
| Ucb, Inc. | $105.35 | 4 |
| Janssen Biotech, Inc. | $99.99 | 1 |
| Novartis Pharmaceuticals Corporation | $90.07 | 3 |
| Glaxosmithkline, LLC. | $59.43 | 3 |
What the 2025 payments were for
- Food and Beverage$628.53 · 33 payments
- Education$99.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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