Roya Marzieh Nasseri, M.D.
Family Medicine Physician · Simi Valley, CA
Roya Marzieh Nasseri, M.D. is a family medicine physician with a practice address in Simi Valley, California, and NPI 1265695688, issued on Jul 7, 2008. Check the license (California C146434, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Roya Marzieh Nasseri
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- C146434 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2655 1St St Ste 360, Simi Valley, CA 93065
- Phone
- (805) 583-7640
- Enumerated
- Jul 7, 2008
- Record last updated
- Jan 12, 2026
- Fax
- (805) 583-7641
- Medicare enrollment
- Enrolled (PECOS I20170207001619); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 2655 1St St Ste 360
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Austin DavisFamily Medicine Physician1912438409
- Gregory Glover, M.D.Cardiovascular Disease Physician1396060638
- Jeffrey Harrell, M.D.Interventional Cardiology Physician1396058095
- Adrienne LenhartGastroenterology Physician1740608371
Verify Roya Marzieh Nasseri in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C146434Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% fewer Medicare Part D claims than the average family medicine physician in 2024
2,329 Medicare Part D claims for 304 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium240 claims
- Levothyroxine Sodium137 claims
- Amlodipine Besylate124 claims
- Losartan Potassium85 claims
- Lisinopril67 claims
- Metoprolol Succinate67 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: $31.02
1 payment: food and beverage; the largest payer was Lilly USA, LLC. The 55,478 providers of this specialty with any payment received $902.55 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
- The Regents OF The University OF CaliforniaSimi Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
60 family medicine physician records list a practice address in Simi Valley
They are 60 of the 1,397 NPPES records with a practice address in Simi Valley, and 17,133 family medicine physician records in California.
All 60 in Simi Valley → All 17,133 in California → Every provider in Simi Valley →
Other family medicine physician records in California
- Omer Aba-Omer, MDSanta Monica, CA1649702093
- Michelle Ababa, MDWilmington, CA1710922513
- Anna Tzeitel Abalos, MDRoseville, CA1720200017
- Adan Abarca, MDAnaheim, CA1760553689
- Vanessa Abarca, DOVentura, CA1952040859
- Lorraine Abate, M.D.Sacramento, CA1104840008
- Robert Abatecola, MDCastro Valley, CA1669551719
- Romeo Abaya, M.D.Cottonwood, CA1598053506
- Effiem Abbah, MD, MPHSan Francisco, CA1821185133
- Khuzeman Abbasi, MDSanta Rosa, CA1841979952
Common questions
What is Roya Marzieh Nasseri, M.D.'s NPI number?
Roya Marzieh Nasseri, M.D.'s National Provider Identifier (NPI) is 1265695688, issued on Jul 7, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Roya Marzieh Nasseri, M.D. located?
The NPPES record lists a practice address at 2655 1St St Ste 360, Simi Valley, CA, 93065. Phone: (805) 583-7640. Providers update this record themselves, so call before visiting.
How can I verify Roya Marzieh Nasseri, M.D.'s license?
NPPES lists California license number C146434, 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 Roya Marzieh Nasseri, M.D. prescribe under Medicare Part D?
In 2024, Roya Marzieh Nasseri, M.D. had 2,329 Medicare Part D claims for 304 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.