DR. JOSE J DIAZ M.D.
NPI 1306880836
Emergency Medicine in Chino, CA
About Dr. Jose J Diaz M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOSE J DIAZ M.D. (NPI 1306880836) is an individual emergency medicine provider in Chino, California, licensed in California (A64744) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Northern Nevada Medical Center, and maintains a secondary practice location in Carlsbad.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Jose J Diaz M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Jose Diaz reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chino, CA 91710
- Reassigned Medicare billing, California enrollment
- 99 clinicians in this Medicare group
Montclair, CA 91763
- Reassigned Medicare billing, California enrollment
- 98 clinicians in this Medicare group
San Dimas, CA 91773
- Reassigned Medicare billing, California enrollment
- 75 clinicians in this Medicare group
Corona, CA 92882
- Reassigned Medicare billing, California enrollment
- 114 clinicians in this Medicare group
Sparks, NV 89434
- Reassigned Medicare billing, Nevada enrollment
- 44 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Northern Nevada Medical Center
Acute Care Hospitals · Sparks, NVPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 91710 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CHINO, CA 91710
CHINO, CA 91710
CHINO, CA 91710
CHINO, CA 91710
CHINO, CA 91710
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Jose Diaz's NPI number?
The NPI number for Jose Diaz is 1306880836. It was assigned to this individual provider in the NPPES registry on June 15, 2006.
Where is Jose Diaz located?
Jose Diaz practices at 5451 Walnut Ave, Chino, CA 91710. The listed phone number is (909) 464-8667.
What is Jose Diaz's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Jose Diaz enrolled in Medicare?
Yes. Jose Diaz is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Jose Diaz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jose Diaz reassigns Medicare benefits to 5 organizations: Chino Emergency Medical Associates, Inc. (Chino, CA), Montclair Emergency Medical Associates (Montclair, CA), San Dimas Emergency Medical Associates Inc. (San Dimas, CA), Corona Regional Emergency Medical Associates Inc (Corona, CA) and Edwards Bell MD PC (Sparks, NV). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Jose Diaz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Jose Diaz affiliated with any hospitals?
According to CMS data, Jose Diaz is affiliated with Northern Nevada Medical Center.
When was this NPI record last updated?
The NPPES record for Jose Diaz was last updated on November 16, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Jose J Diaz, M.D. · NPI 1306880836
Emergency Medicine physician in Chino, California. Individual provider, active in the CMS NPPES registry since June 15, 2006.
## Identity
- **NPI:** 1306880836 (Entity type: Individual)
- **Enumerated:** June 15, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A64744 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 5451 WALNUT AVE, Chino, CA 91710-2609
- **Phone:** (909) 464-8667
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Chino Emergency Medical Associates, Inc. (NPI 1013282029, Chino, CA); Montclair Emergency Medical Associates (NPI 1316044696, Montclair, CA); San Dimas Emergency Medical Associates Inc. (NPI 1720239460, San Dimas, CA); Corona Regional Emergency Medical Associates Inc (NPI 1134629298, Corona, CA); Edwards Bell MD PC (NPI 1740157098, Sparks, NV) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Francisco School Of Medicine, class of 1996
## Record status
- **NPPES last updated:** November 16, 2022
- **Other identifiers:** Medicaid 00A647440 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1306880836) · Data from the CMS NPPES public registry.