OCCUPATIONAL HEALTH CENTERS OF CALIFORNIA, A MEDICAL CORPORATION
OCCUPATIONAL HEALTH CENTERS OF CALIFORNIA, A MEDICAL CORPORATION is an organization registered with the National Plan and Provider Enumeration System (NPPES) under NPI 1003383274, based in Pomona, CA. The organization lists 3 taxonomy classifications, with Occupational Medicine Clinic/Center recorded as primary.
Getting there
Here is what surrounds this office in Pomona, based on OpenStreetMap data collected Sep 18, 2026. Parking is available about 0.30 mi away. The nearest transit stop is 0.29 mi away, served by Foothill Transit 480.
Getting here and what is nearby
Transit Foothill Transit 195, 482 159 ft ~1 min
Parking 356 ft ~2 min
Parking 495 ft ~2 min
Transit Foothill Transit 195, 482 761 ft ~3 min
Transit Foothill Transit 480 0.29 mi ~6 min
Parking 0.30 mi ~6 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 Occupational Medicine covers
Definition to come... NUCC Health Care Provider Taxonomy, code 261QX0100X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 261QX0100X | Occupational Medicine Clinic/Center Occupational Medicine | — | — | primary |
| 261QP2000X | Physical Therapy Clinic/Center Physical Therapy | — | — | |
| 261QH0100X | Health Service Clinic/Center Health Service | — | — |
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-2 identifies an organization — a clinic, hospital, group practice, laboratory, or supplier. Individual clinicians working there hold their own NPI-1 numbers separately, so a bill may reference both.
| NPI | 1003383274 valid check digit |
|---|---|
| Entity type | Organization (NPI-2) |
| Enumeration date | Oct 25, 2018 |
| Last updated | Jun 20, 2025 |
| Status | Active |
| Practice address |
801 CORPORATE CENTER DR STE 130 Pomona, CA 91768 (909) 623-1954 Fax (909) 623-4988 |
| Mailing address |
5080 SPECTRUM DR STE 1200W Addison, TX 75001 |
| Other names |
Concentra Medical Center Former Legal Name |
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 | 3 | 8 | 3 | 2 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 8 | 6 | 2 | 5 |
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.