Kirollos Zaki, D.O
Nephrology Physician · Riverside, CA
Kirollos Zaki, D.O is a nephrology physician with a practice address in Riverside, California, and NPI 1104270305, issued on Apr 14, 2016. Check the license (California 20A16166, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kirollos Zaki
- Credential
- D.O
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- 20A16166 CA
16166 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3660 Park Sierra Dr Ste 208, Riverside, CA 92505
- Phone
- (951) 687-2800
- Enumerated
- Apr 14, 2016
- Record last updated
- Sep 2, 2022
- Fax
- (951) 687-7290
- Medicare enrollment
- Enrolled (PECOS I20190326000136); accepts Medicare assignment
- Medical or professional school
- Kansas City University Of Physicians And Surgeons, 2016
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 3660 Park Sierra Dr Ste 208
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Richard Eric Atangan, FNP-BC, NP-CFamily Nurse Practitioner1871245688
- Lerma Dacasin, FNP-CFamily Nurse Practitioner1295566099
- Sible RebelloNurse Practitioner1174030506
- Laura Rigby, NPFamily Nurse Practitioner1831674191
Verify Kirollos Zaki in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A16166Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% fewer Medicare Part D claims than the average nephrology physician in 2024
1,146 Medicare Part D claims for 174 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate74 claims
- Nifedipine Er58 claims
- Farxiga57 claims
- Januvia55 claims
- Losartan Potassium54 claims
- Sevelamer Carbonate47 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): 57.6 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: $138.06
7 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 8,230 providers of this specialty with any payment received $3,091.37 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
- Nephrology Associates Medical Group IncRiverside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kirollos Zaki among 1,468 nephrology physician records in California
Kirollos Zaki, D.O is one of 1,468 nephrology physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 89% of them.
- NPI issued2016 · 89% of these records are older, 9% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2016 · median 2001 among the 1,128 with a school on file
- Record last updated2022 · 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 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in Riverside → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Rizwan Badar, M.D.Riverside, CA 925051073761243
- Arthur Galoustian, MDRiverside, CA 925051487685426
- Naveen Gupta, MDRiverside, CA 925051790979938
- Salam Ishak, M.DRiverside, CA 925051427152842
- Taher Khalil, M.D.Riverside, CA 925051962458752
- Joseph Lee, M.D.Riverside, CA 925051477599579
- Howard Lee, DORiverside, CA 925051932276144
- Hamik Martirosyan, MDRiverside, CA 925051316014145
Common questions
What is Kirollos Zaki, D.O's NPI number?
Kirollos Zaki, D.O's National Provider Identifier (NPI) is 1104270305, issued on Apr 14, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Kirollos Zaki, D.O located?
The NPPES record lists a practice address at 3660 Park Sierra Dr Ste 208, Riverside, CA, 92505. Phone: (951) 687-2800. Providers update this record themselves, so call before visiting.
How can I verify Kirollos Zaki, D.O's license?
NPPES lists California license number 20A16166, as entered by the provider. 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 Kirollos Zaki, D.O prescribe under Medicare Part D?
In 2024, Kirollos Zaki, D.O had 1,146 Medicare Part D claims for 174 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Kirollos Zaki, D.O's MIPS final score?
The 2023 MIPS final score is 57.6 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.