Sepideh Homayoni, PA-C
Sepideh Homayoni, PA-C is a Physician Assistant in Ontario, CA, registered under NPI 1003357955. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Ontario, based on OpenStreetMap data collected Sep 21, 2026. Parking is available about 0.24 mi away. The nearest transit stop is 0.46 mi away, served by Ontario Airport @ Terminal Way 4.
Getting here and what is nearby
Hotel Fairfield Inn Ontario 235 ft ~1 min
Restaurant Panda Inn 452 ft ~2 min
3223 Centrelake Dr, Ontario
Hotel Hampton Inn by Hilton Ontario Airport 757 ft ~3 min
Hotel Home2 Suites by Hilton Ontario Airport 757 ft ~3 min
Restaurant TGI Fridays 932 ft ~4 min
3351 Centrelake Dr, Ontario
Parking 0.20 mi ~5 min
Parking 0.22 mi ~5 min
Parking 0.24 mi ~5 min
Transit Ontario Airport @ Terminal Way 4 0.46 mi ~10 min
Restaurant Einstein Bros. Bagels 0.49 mi ~10 min
2900 East Airport Drive, Ontario 91761
Mo-We 05:00-11:30; Th 05:00-21:00; Fr-Su 05:00-11:30
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 54279 | CA | Physician Assistant primary |
This provider holds licence 54279 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Physician Assistant
- PAC ID
- 7517228224
- Enrollment ID
- I20180220002708
Medicare enrolment is recorded as approved under the provider type Practitioner - Physician Assistant. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Physician Assistant covers
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician. NUCC Health Care Provider Taxonomy, code 363A00000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003357955 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 12, 2017 |
| Last updated | Oct 27, 2023 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | PA-C |
| Practice address |
3281 E GUASTI RD Ontario, CA 91761 (909) 295-7073 |
| Other names |
Sepideh Homayoninejad Former Legal Business Name |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 3 | 5 | 7 | 9 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 5 | 5 | 9 | 1 |
Sum = 55 · next multiple of 10 = 60 · check digit = 5 · actual last digit = 5
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.