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Dr. Kirollos E. Zaki, DO
NPI1104270305PAC ID1658611801
- Medicare services, 2024
- 1,197
- Medicare patients, 2024
- 287
- Part D claims, 2024
- 1,146
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 3660 Park Sierra Dr, Riverside, CA 92505
- Practice phone
- Call (951) 278-8870
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mission Surgical Group
Riverside, California
Find Dr. Zaki's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Kirollos E. Zaki is a nephrologist in Riverside, California
Dr. Zaki practices at Mission Surgical Group in Riverside, California.
Dr. Zaki's NPI, 1104270305, was assigned on April 14, 2016. Dr. Zaki graduated from Kansas City University of Medicine and Biosciences College of Osteopathic Medicine in 2016. Dr. Zaki's California license number on file is 20A16166.
NPI and contact details
- NPI
- 1104270305NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1658611801
- NPI enumeration date
- April 14, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (951) 278-8870
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Kirollos E. Zaki practices at Mission Surgical Group in Riverside, California
Dr. Zaki's primary practice is Mission Surgical Group, at 3660 Park Sierra Dr, Riverside, CA 92505 in Riverside County. The practice phone is (951) 278-8870.
- Mission Surgical Group3660 Park Sierra Dr, Riverside, CA 92505 · Riverside CountyPhone(951) 278-8870
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Kirollos E. Zaki is affiliated with 7 sites of care and 2 medical groups
Dr. Zaki's primary practice is Mission Surgical Group in Riverside, California. Dr. Zaki is also affiliated with Riverside Community Hospital. The medical group on file is Nephrology Associates Medical Group. Dmand AI also links Dr. Zaki to 4 more dialysis centers, 1 group practice or clinic and 1 medical group, each named with a free account.
Mission Surgical GroupPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Kirollos E. Zaki's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zaki practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mission Surgical Group | Available with a free account |
| +6 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Zaki practices
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Dr. Kirollos E. Zaki is one of 1,401 nephrologists in California
Nephrology is Dr. Zaki's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Zaki is board certified in internal medicine by the American Board of Internal Medicine. Dr. Zaki has a license on file in California.
Specialties and state licenses
- Nephrology, CaliforniaPrimary
Clinical focus
Dmand AI lists chronic kidney disease among the conditions Dr. Zaki treats.
Nephrologists near Dr. Zaki
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Kirollos E. Zaki billed Medicare for 1,197 services in 2024
CMS data shows 1,197 Medicare services from Dr. Zaki across 11 procedure codes in 2024, for 287 Medicare patients. Medicare paid $142,715 for them.
Medicare services, 20241,197
Medicare patients287
Paid by Medicare$142,715
Procedure codes11
Dr. Zaki's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,0782024: 91615%
- Tests and treatments
- 2023: 2602024: 2683%
- Other services
- 2023: 02024: 13
Where Dr. Zaki's Medicare services took place, 2024
- In an office36230%
- In a facility83570%
Dr. Zaki compared with the California median for nephrologists, 2024
- Dr. Zaki
- California median
- Medicare services
- 1,197vs 1,08410% above
- Medicare patients
- 287vs 3077% below
- Part D claims
- 844vs 95512% below
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Zaki's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Zaki?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zaki and other nephrologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Kirollos E. Zaki treated 287 Medicare patients in 2024, average age 70
CMS counts 287 Medicare patients who saw Dr. Zaki in 2024. The largest group is 65 to 74, with 98 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 70% are also on Medicaid. Their average risk score is 6.04, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Zaki's median patient age at 67, with 45% women.
Medicare patients, 2024287
Average age70
Average risk score6.04
Also on Medicaid70%
Dr. Zaki's Medicare patients by age, 2024
Dr. Zaki's Medicare patients by sex, 2024
- Women15253%
- Men13547%
Chronic conditions among Dr. Zaki's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes74%
- Heart failure63%
- Ischemic heart disease50%
- Arthritis49%
- Mood disorders47%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zaki's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women45%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Kirollos E. Zaki wrote 1,146 Medicare Part D claims in 2024
In 2024, Dr. Zaki wrote 1,146 Medicare Part D claims for 174 patients. 68% of them were for generic drugs. CMS names the drug for 844 of them, across 27 drugs with 11 or more claims each, at $318,481 in total drug cost. In 2023, CMS named 492 claims across 18 drugs.
Part D claims, 20241,146
Drugs named by CMS27
Total drug cost$318,481
Part D patients174
Dr. Zaki's Part D claims by kind of drug, 2024
- Generic785 claims68%
- Brand-name and other361 claims32%
Dr. Zaki's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Zaki's Part D claims, 2024
- Antibiotics1%17 of 1,146 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4922024: 84472%
Drugs named by CMS: 27 in 2024, 18 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Kirollos E. Zaki takes part in Medicare
Dr. Zaki accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
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Dr. Kirollos E. Zaki has 1 publication on record
Dmand AI links 1 paper to Dr. Zaki in 2023. Dr. Zaki's most frequent co-authors are Mark Asef, MD and Marvi Hussain, MD.
Papers1
Dr. Zaki's most frequent co-authors
Recent publications by Dr. Zaki
See who Dr. Zaki researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Zaki works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Kirollos E. Zaki received $474 in industry payments from 2020 to 2025
CMS Open Payments shows 20 general payments to Dr. Zaki from 8 drug and device companies from 2020 to 2025. Food and beverage make up the largest share, 77% of the total. AstraZeneca Pharmaceuticals LP paid the most, $117.
General payments to Dr. Zaki by program year, 2020 to 2025
General payments to Dr. Zaki by kind, 2020 to 2025
$474in total
- Food and beverage$36477%
- Education$11023%
Companies that paid Dr. Zaki the most, 2020 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Kirollos E. Zaki graduated from Kansas City University of Medicine and Biosciences College of Osteopathic Medicine
Dr. Zaki graduated from Kansas City University of Medicine and Biosciences College of Osteopathic Medicine in 2016. Dr. Zaki is a member of ACP and ASN.
- Medical school
- Board certified in internal medicine
- Board certified in nephrology
Source: Dmand AI Professional Profile Data
Dr. Kirollos E. Zaki accepts plans from 11 insurance carriers
Dr. Zaki is in network with 11 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Kaiser Permanente
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Molina
- Regence Health Plans
- +3 more carriersWith a free account
Plan types Dr. Zaki accepts, by number of carriers
- Medicare8
- HMO6
- PPO6
- POS4
- EPO3
Source: Dmand AI Insurance Network Data
Sources for Dr. Kirollos E. Zaki's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Kirollos E. Zaki
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Kirollos E. Zaki's NPI number?
Dr. Kirollos E. Zaki's NPI number is 1104270305. It was assigned on April 14, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Kirollos E. Zaki?
Dr. Kirollos E. Zaki is a nephrologist in Riverside, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Kirollos E. Zaki practice?
Dr. Zaki practices at 3660 Park Sierra Dr, Riverside, CA 92505. Dr. Zaki's primary practice is Mission Surgical Group in Riverside, California. Dmand AI also links Dr. Zaki to 4 dialysis centers, 1 group practice or clinic and 1 medical group.
What is Dr. Kirollos E. Zaki's office phone number?
The practice phone on file for Dr. Zaki is (951) 278-8870.
What is Dr. Kirollos E. Zaki's medical license number?
Dr. Zaki's California license number on file is 20A16166.
Which hospitals is Dr. Kirollos E. Zaki affiliated with?
Dr. Zaki is affiliated with Riverside Community Hospital.
What medical group is Dr. Kirollos E. Zaki part of?
Dr. Zaki is linked to Nephrology Associates Medical Group. Dmand AI links Dr. Zaki to 1 more medical group.
Does Dr. Kirollos E. Zaki accept Medicare?
Yes. CMS data shows Dr. Zaki billed Medicare for 1,197 services in 2024, and Dr. Zaki accepts Medicare assignment.
How many Medicare patients does Dr. Kirollos E. Zaki see?
CMS counts 287 Medicare patients who saw Dr. Zaki in 2024, with an average age of 70.
Is Dr. Kirollos E. Zaki board certified?
Yes. Dr. Zaki is board certified in internal medicine by the American Board of Internal Medicine.
Show 8 more questionsShow fewer questions
What services does Dr. Kirollos E. Zaki bill to Medicare?
In 2024, Dr. Zaki's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99232) and dialysis (90960).
Where did Dr. Kirollos E. Zaki go to medical school?
Dr. Zaki graduated from Kansas City University of Medicine and Biosciences College of Osteopathic Medicine in 2016.
What drugs does Dr. Kirollos E. Zaki prescribe most?
In 2024 Medicare Part D data, Dr. Zaki's most prescribed drugs by claims were Amlodipine Besylate, Nifedipine ER and Farxiga.
Has Dr. Kirollos E. Zaki received payments from drug or device companies?
CMS Open Payments shows $474 in general payments to Dr. Zaki from 8 companies from 2020 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Kirollos E. Zaki been practicing?
Dr. Zaki graduated from medical school in 2016, 10 years ago.
Does Dr. Kirollos E. Zaki do research?
Dmand AI links 1 publication to Dr. Zaki.
Who does Dr. Kirollos E. Zaki publish with?
Dr. Zaki's most frequent co-authors are Mark Asef, MD (1 shared paper) and Marvi Hussain, MD (1 shared paper).
What insurance does Dr. Kirollos E. Zaki accept?
Dr. Zaki is in network with 11 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
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