Crystal Martin, PA
Crystal Martin, PA is a Physician Assistant in Tustin, CA, registered under NPI 1003577768. 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 Tustin, based on OpenStreetMap data collected Sep 24, 2026. Parking is available about 0.51 mi away. The nearest transit stop is 764 ft away, served by 1st-Tustin. A pharmacy sits 0.48 mi from the entrance (Santa Ana Tustin Compounding Pharmacy), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 844 ft away.
Getting here and what is nearby
Transit 1st-Yorba 221 ft ~1 min
Transit 1st-Pacific 379 ft ~2 min
Convenience 7-Eleven 442 ft ~2 min
Transit 1st-Tustin 764 ft ~3 min
Coffee Starbucks 844 ft ~4 min
Parking 888 ft ~4 min
Restaurant Del Taco 909 ft ~4 min
Parking 949 ft ~4 min
Convenience ExtraMile 983 ft ~4 min
Gas station Chevron 1,021 ft ~4 min
Restaurant Subway 0.21 mi ~5 min
2321 East 4th Street, Santa Ana 92705
Mo-Fr 07:30-20:00; Sa 09:00-19:00
Gas station US Gas 0.22 mi ~5 min
Gas station ezy gas 0.23 mi ~5 min
Restaurant Avila's El Ranchito 0.24 mi ~5 min
2201 East 1st Street, Santa Ana 92705
Hotel Guest Inn 0.27 mi ~6 min
2151 East 1st Street, Santa Ana 92705
Hotel Bel Air Motor Hotel 0.40 mi ~8 min
140 West 1st Street, Tustin 92780
Pharmacy Santa Ana Tustin Compounding Pharmacy 0.48 mi ~10 min
Mo-Sa 09:00-18:00
Parking 0.51 mi ~11 min
1904 East 4th Street, Santa Ana 92705
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 |
|---|---|---|
| PA61320 | CA | Physician Assistant primary |
This provider holds licence PA61320 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
- 4183069586
- Enrollment ID
- I20240620000215
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 | 1003577768 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 5, 2022 |
| Last updated | Oct 23, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Female |
| Credential | PA |
| Practice address |
661 W 1ST ST STE G Tustin, CA 92780 (714) 665-9890 Fax (714) 665-9891 |
| Other identifiers |
951641454
· Medicaid (CA) |
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 | 5 | 7 | 7 | 7 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 7 | 5 | 7 | 3 |
Sum = 52 · next multiple of 10 = 60 · check digit = 8 · actual last digit = 8
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.