Mosen Istwani, MD
Nephrology Physician · Riverside, CA
Mosen Istwani, MD is a nephrology physician with a practice address in Riverside, California, and NPI 1043229453, issued on Aug 5, 2006. Check the license (California A64871, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mosen Istwani
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A64871 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3595 Van Buren Blvd, Riverside, CA 92503
- Phone
- (951) 343-1978
- Enumerated
- Aug 5, 2006
- Record last updated
- Mar 21, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (951) 343-1922
- Medicare enrollment
- Enrolled (PECOS I20090622000653); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 3595 Van Buren Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mohammed Khan, M.D.Specialist1912008087
Verify Mosen Istwani in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A64871Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average nephrology physician in 2024
345 Medicare Part D claims for 44 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate30 claims
- Sevelamer Carbonate30 claims
- Furosemide26 claims
- Hydralazine Hcl25 claims
- Lisinopril21 claims
- Losartan Potassium16 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.
Industry payments in 2024: $297.09
14 payments; by number, the most common kind was food and beverage; the largest payer was Akebia Therapeutics Inc. 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
- Riverside Nephrology Physicians IncPerris, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mosen Istwani among 1,468 nephrology physician records in California
Mosen Istwani, MD 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 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 48% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated1990 · median 2001 among the 1,128 with a school on file
- Record last updated2013 · 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
- Akpobo Akporotu, MDRiverside, CA 925031396285698
- Henry Dorman, M.D.Riverside, CA 925031265529259
- Hira Al-AdroosRiverside, CA 925011942950951
- 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
Common questions
What is Mosen Istwani, MD's NPI number?
Mosen Istwani, MD's National Provider Identifier (NPI) is 1043229453, issued on Aug 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mosen Istwani, MD located?
The NPPES record lists a practice address at 3595 Van Buren Blvd, Riverside, CA, 92503. Phone: (951) 343-1978. Providers update this record themselves, so call before visiting.
How can I verify Mosen Istwani, MD's license?
NPPES lists California license number A64871, 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 Mosen Istwani, MD prescribe under Medicare Part D?
In 2024, Mosen Istwani, MD had 345 Medicare Part D claims for 44 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
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.