Geoff Blaylock
Geoff Blaylock is an Addiction (Substance Use Disorder) Counselor in Santa Ana, CA, registered under NPI 1003093394. 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 Santa Ana, based on OpenStreetMap data collected Sep 5, 2026. Parking is available about 961 ft away at 1. The nearest transit stop is 922 ft away, served by 17th-Bristol Market Place. If you arrive early, there is a coffee shop 0.33 mi away.
Getting here and what is nearby
Parking 344 ft ~2 min
Grocery Smart & Final 573 ft ~3 min
1523 West 17th Street, Santa Ana 92706
Transit 17th-College 794 ft ~4 min
Transit 17th-College 872 ft ~4 min
Transit 17th-Bristol Market Place 922 ft ~4 min
Coffee Starbucks (Target) 976 ft ~4 min
Parking 13 936 ft ~4 min
Parking 1 961 ft ~4 min
Restaurant Chipotle 0.30 mi ~7 min
Restaurant Carl's Jr. 0.31 mi ~7 min
Restaurant Taco Bell 0.32 mi ~7 min
Coffee Starbucks 0.33 mi ~7 min
Grocery Puerto Madero 0.43 mi ~9 min
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 Addiction (Substance Use Disorder) covers
Definition to come... NUCC Health Care Provider Taxonomy, code 101YA0400X
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 | 1003093394 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 29, 2008 |
| Last updated | Jan 29, 2008 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Practice address |
1905 COLLEGE AVE Santa Ana, CA 92706 (714) 479-0120 |
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 | 0 | 9 | 3 | 3 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 9 | 6 | 3 | 9 |
Sum = 56 · next multiple of 10 = 60 · check digit = 4 · actual last digit = 4
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.