JAMES MATHEW MILLER DO
NPI 1942999107
Emergency Medicine in Moreno Valley, CA
About James Mathew Miller Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JAMES MATHEW MILLER DO (NPI 1942999107) is an individual emergency medicine provider in Moreno Valley, California, licensed in California (20A23144) and active in the NPI registry since May 2023. He is enrolled in Medicare PECOS and is a graduate of Other (2023).
NPPES Registry Identity
Specialties & Licenses 2
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
James Mathew Miller Do 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 James Miller reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Moreno Valley, CA 92555
- Reassigned Medicare billing, California enrollment
- 2,323 clinicians in this Medicare group
Moreno Valley, CA 92555
- Reassigned Medicare billing, California enrollment
- 27 clinicians in this Medicare group
Fontana, CA 92336
- Reassigned Medicare billing, California enrollment
- 95 clinicians in this Medicare group
Murrieta, CA 92562
- Reassigned Medicare billing, California enrollment
- 112 clinicians in this Medicare group
Upland, CA 91786
- Reassigned Medicare billing, California enrollment
- 103 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92555 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.
MORENO VALLEY, CA 92555
MORENO VALLEY, CA 92555
MORENO VALLEY, CA 92555
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 James Miller's NPI number?
The NPI number for James Miller is 1942999107. It was assigned to this individual provider in the NPPES registry on May 3, 2023.
Where is James Miller located?
James Miller practices at 26520 Cactus Ave, Moreno Valley, CA 92555. The listed phone number is (951) 486-5650.
What is James Miller's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is James Miller enrolled in Medicare?
Yes. James Miller 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 James Miller's services?
According to the CMS Revalidation Reassignment List (October 2026 release), James Miller reassigns Medicare benefits to 5 organizations: Cep America - California (Moreno Valley, CA), Southern California Emergency Medicine (Moreno Valley, CA), Mountain View Urgent Care Group, Inc (Fontana, CA), Em Alliance California, Apc (Murrieta, CA) and Mountain View Emergency Physicians Medical Group, Inc. (Upland, CA). 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 James Miller's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for James Miller was last updated on July 18, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months 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.
# James Mathew Miller, DO · NPI 1942999107
Emergency Medicine physician in Moreno Valley, California. Individual provider, active in the CMS NPPES registry since May 3, 2023.
## Identity
- **NPI:** 1942999107 (Entity type: Individual)
- **Enumerated:** May 3, 2023
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 20A23144 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 26520 CACTUS AVE, Moreno Valley, CA 92555-3927
- **Phone:** (951) 486-5650
## 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): Cep America - California (NPI 1215042338, Moreno Valley, CA); Southern California Emergency Medicine (NPI 1518380765, Moreno Valley, CA); Mountain View Urgent Care Group, Inc (NPI 1023306784, Fontana, CA); Em Alliance California, Apc (NPI 1376305755, Murrieta, CA); Mountain View Emergency Physicians Medical Group, Inc. (NPI 1619923653, Upland, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2023
## Record status
- **NPPES last updated:** July 18, 2025
---
Source: [NPI Profile](https://npiprofile.com/npi/1942999107) · Data from the CMS NPPES public registry.