Bill Haddock
Bill Haddock is an Addiction (Substance Use Disorder) Counselor in San Mateo, CA, registered under NPI 1003412073. 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 San Mateo, based on OpenStreetMap data collected Sep 25, 2026. Parking is available about 215 ft away. There is EV charging 0.44 mi from the office (Tesla Supercharger) — useful if you are driving in from out of town. The nearest transit stop is 0.20 mi away, served by El Camino Real & 25th Avenue. A pharmacy sits 0.48 mi from the entrance (Rite Aid), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 687 ft away.
Getting here and what is nearby
Parking 181 ft ~1 min
Parking 190 ft ~1 min
Parking 215 ft ~1 min
Hotel Stone Villa Inn 257 ft ~1 min
2175 S El Camino Real, San Mateo 94403
Hotel Stone Villa Inn 241 ft ~1 min
Coffee Kaizen & Coffee 687 ft ~3 min
2337 South El Camino Real, 94403
Mo-Su 07:00-16:00
Restaurant Chai Yo Thai Cuisine 728 ft ~3 min
2116 South El Camino Real, 94403
Tu-Sa 11:00-15:00, 17:00-21:00
Transit El Camino Real & 25th Avenue 799 ft ~4 min
Restaurant Little Shanghai 782 ft ~3 min
Restaurant Daiki Sushi 797 ft ~4 min
2075 El Camino Real, 94403
Mo-Fr 11:00-15:00, 17:00-21:30; Sa-Su 12:00-21:30
Convenience Wes Liquors 962 ft ~4 min
Transit South Delaware Street & Pacific Boulevard 979 ft ~4 min
Transit El Camino Real & 25th Avenue 0.20 mi ~4 min
Grocery Nijiya Market 0.27 mi ~6 min
1956 El Camino Real, San Mateo 94403
PH,Mo-Su 10:00-20:00
Gas station Arco 0.34 mi ~7 min
Gas station Exxon 0.36 mi ~8 min
EV charging Tesla Supercharger 0.44 mi ~9 min
Pharmacy CVS Pharmacy 0.48 mi ~10 min
Pharmacy Rite Aid 0.48 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 | 1003412073 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Dec 7, 2020 |
| Last updated | Dec 7, 2020 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Practice address |
2251 PALM AVE San Mateo, CA 94403 (650) 513-6500 |
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 | 4 | 1 | 2 | 0 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 1 | 4 | 0 | 5 |
Sum = 47 · next multiple of 10 = 50 · check digit = 3 · actual last digit = 3
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.