Nayef Mohammed A. Kazzaz, M.D
Rheumatology Physician · Riverside, CA
Nayef Mohammed A. Kazzaz, M.D is a rheumatology physician with a practice address in Riverside, California, and NPI 1316234693, issued on Jul 7, 2011. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nayef Mohammed A. Kazzaz
- Credential
- M.D
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 51325 KY
Self-reported in NPPES; status is on the state search - Practice location
- 6180 Brockton Ave Ste 204, Riverside, CA 92506
- Phone
- (951) 781-7700
- Enumerated
- Jul 7, 2011
- Record last updated
- Feb 11, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (951) 781-0313
- Medicare enrollment
- Enrolled (PECOS I20210218002433); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 6180 Brockton Ave Ste 204
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Asbat Hasan, MDRheumatology Physician1215499256
- Linda Lazar, DORheumatology Physician1184999559
- Ryanne McClellan, FNP-CFamily Medicine Physician1275480766
- Babak Zamiri, M.D.Specialist1013991041
Verify Nayef Mohammed A. Kazzaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% fewer Medicare Part D claims than the average rheumatology physician in 2024
850 Medicare Part D claims for 189 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D.
Most prescribed
- Hydroxychloroquine Sulfate113 claims
- Prednisone94 claims
- Methotrexate75 claims
- Humira(Cf) Pen61 claims
- Prolia57 claims
- Allopurinol32 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $709.84
34 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 4,486 providers of this specialty with any payment received $8,538.33 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Arthritis Medical ClinicRiverside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nayef Mohammed A. Kazzaz among 926 rheumatology physician records in California
Nayef Mohammed A. Kazzaz, M.D is one of 926 rheumatology physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 68% of them.
- NPI issued2011 · 68% of these records are older, 29% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2010 · median 2003 among the 641 with a school on file
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in Riverside → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Andre Babajanians, MDRiverside, CA 925061255311676
- Asbat Hasan, MDRiverside, CA 925061215499256
- Linda Lazar, DORiverside, CA 925061184999559
- Bradley Andersen, M.D.Riverside, CA 925071528018470
- Amy Chang, MDRiverside, CA 925051255490827
- Al Franco, M.D.Riverside, CA 925051528128535
- David Lee, MDRiverside, CA 925051477602886
- Andrew Nguyen, MDRiverside, CA 925051366590291
Common questions
What is Nayef Mohammed A. Kazzaz, M.D's NPI number?
Nayef Mohammed A. Kazzaz, M.D's National Provider Identifier (NPI) is 1316234693, issued on Jul 7, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Nayef Mohammed A. Kazzaz, M.D located?
The NPPES record lists a practice address at 6180 Brockton Ave Ste 204, Riverside, CA, 92506. Phone: (951) 781-7700. Providers update this record themselves, so call before visiting.
How can I verify Nayef Mohammed A. Kazzaz, M.D's license?
Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Nayef Mohammed A. Kazzaz, M.D prescribe under Medicare Part D?
In 2024, Nayef Mohammed A. Kazzaz, M.D had 850 Medicare Part D claims for 189 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Nayef Mohammed A. Kazzaz, M.D's MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.