Farshid Dayyani, M.D., PH.D.
Medical Oncology Physician · Orange, CA
Farshid Dayyani, M.D., PH.D. is a medical oncology physician with a practice address in Orange, California, and NPI 1376710434, issued on May 8, 2008. Check the license (California A125971, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Farshid Dayyani
- Credential
- M.D., PH.D.
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License numbers
- A125971 CA
228902 MA
Self-reported in NPPES; status is on the state search - Practice location
- 101 The City Dr S, Orange, CA 92868
- Phone
- (714) 456-8000
- Enumerated
- May 8, 2008
- Record last updated
- Oct 20, 2022
- Medicare enrollment
- Enrolled (PECOS I20160317002389); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 447 in California → Look up another NPI →
Also registered at 101 The City Dr S
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Danny Abad, PAPhysician Assistant1477158673
- Edward AbaradoStudent in an Organized Health Care Education/Training Program1912855198
- Nagina Abdiani, DOGeriatric Medicine (Family Medicine) Physician1518543271
- Mariam Abdul-Latif, M.D.Pediatrics Physician1538418884
- Eric AbelloOtolaryngology Physician1922566215
- Brandon Abeyta, MDAnesthesiology Physician1841291804
Verify Farshid Dayyani in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A125971Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% fewer Medicare Part D claims than the average medical oncology physician in 2024
604 Medicare Part D claims for 88 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. 29 claims were for opioids.
Most prescribed
- Prochlorperazine Maleate89 claims
- Ondansetron Hcl68 claims
- Olanzapine43 claims
- Dexamethasone24 claims
- Potassium Chloride20 claims
- Pantoprazole Sodium19 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 MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $266,342.49
157 payments; by number, the most common kind was travel and lodging; the largest payer was Takeda Pharmaceuticals U.S.A., Inc. The 3,343 providers of this specialty with any payment received $11,773.47 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
- UC RegentsOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Farshid Dayyani among 447 medical oncology physician records in California
Farshid Dayyani, M.D., PH.D. is one of 447 medical oncology physician records with a practice address in California. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 38% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2002 · median 2004 among the 312 with a school on file
- Record last updated2022 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in California
There are 447 medical oncology physician records in California.
All 447 in California → Every provider in Orange → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Samuel Ejadi, MDOrange, CA 928681285605212
- Sayeh Lavasani, MDOrange, CA 928681205130572
- Susan O'Brien, M.D.Orange, CA 928681669577276
- Jennifer Valerin, M.D.Orange, CA 928681376770255
- Victoria Villaflor, M.D.Orange, CA 928681154380582
- Richard Lloyd, M.D.Fullerton, CA 928351073509030
- David Park, M.D.Fullerton, CA 928351275619447
- Giribala Patel, M.D.Fullerton, CA 928351033106562
Common questions
What is Farshid Dayyani, M.D., PH.D.'s NPI number?
Farshid Dayyani, M.D., PH.D.'s National Provider Identifier (NPI) is 1376710434, issued on May 8, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Farshid Dayyani, M.D., PH.D. located?
The NPPES record lists a practice address at 101 The City Dr S, Orange, CA, 92868. Phone: (714) 456-8000. Providers update this record themselves, so call before visiting.
How can I verify Farshid Dayyani, M.D., PH.D.'s license?
NPPES lists California license number A125971, 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 Farshid Dayyani, M.D., PH.D. prescribe under Medicare Part D?
In 2024, Farshid Dayyani, M.D., PH.D. had 604 Medicare Part D claims for 88 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
What is Farshid Dayyani, M.D., PH.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100. 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.