STEVE C. YUN, M.D., INC
STEVE C. YUN, M.D., INC is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1003194788, based in Santa Ana, CA. It is classified under Anesthesiology Physician.
Getting there
Here is what surrounds this office in Santa Ana, based on OpenStreetMap data collected Sep 10, 2026. Parking is available about 0.34 mi away. The nearest transit stop is 488 ft away, served by 1st-Tustin. A pharmacy sits 0.37 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 305 ft away.
Getting here and what is nearby
Parking 199 ft ~1 min
Transit Tustin-4th 276 ft ~2 min
Convenience ExtraMile 282 ft ~2 min
Coffee Starbucks 305 ft ~2 min
Gas station ezy gas 328 ft ~2 min
Parking 321 ft ~2 min
Transit Tustin-1st 349 ft ~2 min
Gas station Chevron 363 ft ~2 min
Restaurant Del Taco 430 ft ~2 min
Transit 1st-Tustin 488 ft ~2 min
Restaurant Avila's El Ranchito 532 ft ~3 min
2201 East 1st Street, Santa Ana 92705
Gas station US Gas 573 ft ~3 min
Restaurant Subway 639 ft ~3 min
2321 East 4th Street, Santa Ana 92705
Mo-Fr 07:30-20:00; Sa 09:00-19:00
Hotel Guest Inn 666 ft ~3 min
2151 East 1st Street, Santa Ana 92705
Convenience 7-Eleven 0.26 mi ~6 min
Pharmacy Kaiser Permanente - Santa Ana Medical Offices 0.33 mi ~7 min
Parking 0.34 mi ~7 min
1904 East 4th Street, Santa Ana 92705
Pharmacy Santa Ana Tustin Compounding Pharmacy 0.37 mi ~8 min
Mo-Sa 09:00-18:00
Convenience 7-Eleven 0.46 mi ~10 min
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 |
|---|---|---|
| A65231 | CA | Anesthesiology Physician primary |
This provider holds licence A65231 issued in CA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Anesthesiology covers
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery. NUCC Health Care Provider Taxonomy, code 207L00000X
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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1003194788 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Jul 28, 2011 |
| Last updated | May 9, 2019 |
| Status | Active |
| Practice address |
210 N TUSTIN AVE Santa Ana, CA 92705 (714) 320-0084 |
| Mailing address |
PO BOX 2132 Santa Ana, CA 92707 |
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 | 1 | 9 | 4 | 7 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 2 | 9 | 8 | 7 | 7 |
Sum = 62 · next multiple of 10 = 70 · 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.