William Mason
William Mason is a provider specialising in Chiropractor in San Diego, CA, registered under NPI 1003561267. 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 Diego, based on OpenStreetMap data collected Oct 6, 2026. Parking is available about 0.24 mi away. The nearest transit stop is 470 ft away. A pharmacy sits 757 ft from the entrance (Rite Aid), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.24 mi away.
Getting here and what is nearby
Coffee Better Buzz Coffee Roasters 169 ft ~1 min
6605 Mission Gorge Road, 92120
Mo-Su 04:30-21:00
Transit Mission Gorge Rd & Zion Av 232 ft ~1 min
Restaurant Picante Taqueria Mexican Grill 214 ft ~1 min
6620 Mission Gorge Road, San Diego 92120
Mo-Su 10:00-21:00
Restaurant Wendy's 254 ft ~1 min
6585 Mission Gorge Road, San Diego 92120
Mo-Su 06:30-00:00
Restaurant Carl's Jr. 335 ft ~2 min
6566 Mission Gorge Road, San Diego 92120
Mo-Su 06:00-22:00
Transit Mission Gorge Rd & Zion Av 405 ft ~2 min
Transit 470 ft ~2 min
Grocery Vons 486 ft ~2 min
Parking 750 ft ~3 min
Pharmacy Rite Aid 757 ft ~3 min
6505 Mission Gorge Road, San Diego 92120
Parking 0.22 mi ~5 min
Convenience 7-Eleven 0.23 mi ~5 min
Gas station USA Gasoline 0.23 mi ~5 min
6404 Mission Gorge Road, San Diego 92120
Coffee Starbucks 0.24 mi ~5 min
Parking 0.24 mi ~5 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 |
|---|---|---|
| DC36270 | CA | Chiropractor primary |
This provider holds licence DC36270 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 Chiropractor covers
A provider qualified by a Doctor of Chiropractic (D.C.), licensed by the State and who practices chiropractic medicine -that discipline within the healing arts which deals with the nervous system and its relationship to the spinal column and its interrelationship with other body systems. NUCC Health Care Provider Taxonomy, code 111N00000X
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 | 1003561267 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Feb 16, 2022 |
| Last updated | Feb 16, 2022 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Practice address |
6612 MISSION GORGE RD STE B San Diego, CA 92120 (619) 282-8181 |
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 | 6 | 1 | 2 | 6 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 1 | 6 | 2 | 2 | 3 |
Sum = 43 · next multiple of 10 = 50 · check digit = 7 · actual last digit = 7
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.