Greyson Walbrink
Greyson Walbrink is a provider specialising in Student in an Organized Health Care Education/Training Program in Costa Mesa, CA, registered under NPI 1003593195. 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 Costa Mesa, based on OpenStreetMap data collected Oct 9, 2026. Parking is available about 0.50 mi away. There is EV charging 0.20 mi from the office — useful if you are driving in from out of town. The nearest transit stop is 0.43 mi away, served by Sunflower-Plaza. If you arrive early, there is a coffee shop 0.46 mi away.
Getting here and what is nearby
Restaurant Karl Strauss Brewing Company 273 ft ~2 min
Mo-Su 11:30 -23:00
Coffee Boudin SF 422 ft ~2 min
901 South Coast Drive, Costa Mesa 92626
Parking South Coast Plaza Park And Ride 808 ft ~4 min
3333 Bear Street, Costa Mesa 92612
Parking West Parking Garage 925 ft ~4 min
3333 Bear Street, Costa Mesa 92626
Restaurant Wahoo's Fish Taco 1,003 ft ~4 min
3333 Bear Street, Costa Mesa 92626
Mo-Sa 11:00-20:00; Su 11:00-19:00
EV charging 0.20 mi ~4 min
Coffee Starbucks 0.21 mi ~5 min
Transit Sunflower-Bear 0.31 mi ~7 min
Transit Sunflower-Plaza 0.41 mi ~9 min
Restaurant Morton's The Steakhouse 0.41 mi ~9 min
1641 West Sunflower Avenue, Santa Ana 92704
Transit Sunflower-Plaza 0.43 mi ~9 min
Coffee Starbucks 0.46 mi ~10 min
Parking 0.50 mi ~11 min
3675 South Bear Street, Santa Ana 92704
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
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 Student in an Organized Health Care Education/Training Program covers
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care. NUCC Health Care Provider Taxonomy, code 390200000X
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 | 1003593195 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 29, 2023 |
| Last updated | Jun 29, 2023 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Practice address |
940 S COAST DR STE 225 Costa Mesa, CA 92626 (949) 743-1457 |
| Mailing address |
58 CORONADO POINTE Laguna Niguel, CA 92677 |
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 | 9 | 3 | 1 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 9 | 6 | 1 | 9 |
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.