Oliver Henderson
Oliver Henderson is an Addiction (Substance Use Disorder) Counselor in Richmond, CA, registered under NPI 1003092099.
Getting there
Here is what surrounds this office in Richmond, based on OpenStreetMap data collected Sep 5, 2026. Parking is available about 0.45 mi away. The nearest transit stop is 138 ft away, served by Garvin Avenue & 23rd Street.
Getting here and what is nearby
Transit Garvin Avenue & 23rd Street 86 ft ~1 min
Transit 23rd Street & Garvin Avenue 108 ft ~1 min
Transit Garvin Avenue & 23rd Street 138 ft ~1 min
Restaurant Portumex 513 ft ~2 min
Restaurant La Selva 0.31 mi ~7 min
1049 23rd Street
Gas station AM PM 0.40 mi ~8 min
2230 Barrett Avenue, Richmond
Parking 0.40 mi ~9 min
Parking 0.40 mi ~9 min
Restaurant Taco Bell 0.40 mi ~8 min
Grocery Lao Jaleune Supermarket 0.44 mi ~9 min
Parking 0.45 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
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 | 1003092099 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jan 21, 2008 |
| Last updated | Feb 5, 2008 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Practice address |
820 23RD ST Richmond, CA 94804 (510) 229-5000 Fax (510) 235-3112 |
| Mailing address |
300 SHAVANO WAY San Ramon, CA 94583 |
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 | 2 | 0 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 9 | 4 | 0 | 9 |
Sum = 51 · next multiple of 10 = 60 · check digit = 9 · actual last digit = 9
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.