Farshid Dayyani, M.D., PH.D.
NPI 1376710434 · Medical Oncology Physician · Orange, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Farshid Dayyani, M.D., PH.D. is a Medical Oncology Physician provider in Orange, CA (NPI 1376710434).
Provider details
- NPI number
- 1376710434
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A125971 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Hospitals
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
766 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 180 | $107 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 143 | $159 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 139 | $18 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 97 | $18 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prochlorperazine Maleate | 89 | 47 |
| Ondansetron Hcl | 68 | 39 |
| Olanzapine | 43 | 19 |
| Dexamethasone | 24 | 11 |
| Potassium Chloride | 20 | 12 |
| Pantoprazole Sodium | 19 | — |
| Olaparibbrand: Lynparza | 18 | — |
| Lipase/Protease/Amylasebrand: Creon |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$266,342 across 157 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 2946 E Banner Gateway DrGilbert, AZ 85234-2165Phone: (480) 256-6444
Registry dates
- Enumerated
- 2008-05-08
- Last updated
- 2022-10-20
- Certified
- 2022-10-20
Frequently asked questions
- What is Farshid Dayyani's NPI number?
- Farshid Dayyani's National Provider Identifier (NPI) is 1376710434, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Farshid Dayyani's specialty?
- Farshid Dayyani is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Farshid Dayyani located?
- Farshid Dayyani's practice location on file with NPPES is 101 the City Dr S, Orange, CA 92868-3201.
- What is Farshid Dayyani's phone number?
- The practice phone number listed in the NPPES registry for Farshid Dayyani is (714) 456-8000.
- Does Farshid Dayyani accept Medicare?
- Farshid Dayyani is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Farshid Dayyani's NPI active?
- Yes — Farshid Dayyani's NPI (1376710434) is active in the NPPES registry as of the last update on 2022-10-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.