Doctor profile · Federal record
Dr. Farshid Dayyani, M.D., PH.D.
Medical Oncology Physician (CMS: Internal Medicine) · General Acute Care Hospital · Orange, CA
- NPI 1376710434
- Accepts Medicare
- MIPS 91.2 / 100 · 2023
- 24 yrs in practice
- Licensed in 2 states
- Male
- Solo practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
101 the City Dr S
Orange, CA 928683201
(714) 456-8000 - Additional location
-
2946 E Banner Gateway Dr
Gilbert, AZ 852342165
(480) 256-6444
Credentials & registration
- NPI registered
- May 2008 — 18 yrs on file
- Profile last updated
- October 20, 2022
- Year of graduation
- 2002 — 24 yrs since
- Specialty taxonomy
- 207RX0202X — NUCC code
- State licenses (2)
- California #A125971 · Massachusetts #228902
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1376710434. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
521
Distinct HCPCS
4
Medicare allowed
$86,076
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 375 | 122 | $154 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 95 | 49 | $184 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 26 | 26 | $194 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 25 | 25 | $237 |
In context: peer comparison
Among 2 peers in Orange Medical Oncology Physician, average services per provider: 85. This provider delivers 6.1× the peer median.Open Payments
Industry payments received
All-time total
$266,342
Transactions
157
Manufacturers
11
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Takeda Pharmaceuticals U.S.A., INC. | 60 | $121,518.62 | |
| Sirtex Medical INC | 39 | $50,758.64 | |
| Astellas Pharma US INC | 30 | $44,666.61 | |
| Ipsen Biopharmaceuticals, INC | 15 | $26,720.62 | |
| Jazz Pharmaceuticals INC. | 2 | $7,605.00 | |
| Eisai INC. | 3 | $7,065.00 | |
| AstraZeneca Pharmaceuticals Lp | 4 | $5,370.00 | |
| Daiichi Sankyo INC. | 1 | $1,875.00 | |
| Servier Pharmaceuticals LLC | 1 | $464.00 | |
| Exelixis INC. | 1 | $174.00 | |
| Abbvie INC. | 1 | $125.00 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
221
Patients
51
Total drug cost
$262,457
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Prochlorperazine Maleate | Generic | 55 | 27 | $591 |
| Ondansetron Hcl | Generic | 41 | 24 | $726 |
| Diphenoxylate-Atropine (Diphenoxylate Hcl/Atropine) | Brand | 25 | 0 | $525 |
| Eliquis (Apixaban) | Brand | 20 | 0 | $13,269 |
| Lynparza (Olaparib) | Brand | 15 | 0 | $222,549 |
| Olanzapine Odt (Olanzapine) | Brand | 15 | 0 | $454 |
| Sucralfate | Generic | 14 | 0 | $3,439 |
| Dexamethasone | Generic | 13 | 0 | $317 |
| Pantoprazole Sodium | Generic | 12 | 0 | $229 |
| Creon (Lipase/Protease/Amylase) | Brand | 11 | 0 | $20,360 |
Frequently asked questions
What is Dr. Farshid Dayyani's medical specialty?
Dr. Farshid Dayyani practices Medical Oncology Physician in Orange, CA.
Where does Dr. Farshid Dayyani practice?
Dr. Farshid Dayyani practices at 101 the City Dr S, Orange, CA 928683201. Office phone: 7144568000.
What is Dr. Farshid Dayyani's NPI?
Dr. Farshid Dayyani's National Provider Identifier (NPI) is 1376710434, issued by NPPES.
Does Dr. Farshid Dayyani accept Medicare assignment?
Yes. Dr. Farshid Dayyani accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Farshid Dayyani commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99215); Established patient office or other outpatient visit (HCPCS 99215); New patient office or other outpatient visit (HCPCS 99205). Source: CMS Medicare Physician & Other Practitioners file.