EMERGENCY MEDICINE SPECIALISTS OF ORANGE COUNTY
NPI 1740214733
Emergency Medicine in Orange, CA
About Emergency Medicine Specialists Of Orange County NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
EMERGENCY MEDICINE SPECIALISTS OF ORANGE COUNTY (NPI 1740214733) is a healthcare organization registered as an emergency medicine in Orange, California and active in the NPI registry since July 2006. The organization lists Matthew Mullarky, Managing Partner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Emergency Medicine Specialists Of Orange County is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
97Medicare enrollment records show 97 clinicians reassign Medicare billing to Emergency Medicine Specialists Of Orange County, which bills Medicare for the services they deliver. Of these, 15 practice at this address and 31 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 4
Nearest to this location (20)
See all 97Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Emergency Medicine Specialists Of Orange County's NPI number?
The NPI number for Emergency Medicine Specialists Of Orange County is 1740214733. It was assigned to this organization in the NPPES registry on July 10, 2006.
Where is Emergency Medicine Specialists Of Orange County located?
Emergency Medicine Specialists Of Orange County is located at 1100 West Stewart Dr, Orange, CA 92868. The listed phone number is (714) 633-9111.
What is Emergency Medicine Specialists Of Orange County's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Emergency Medicine Specialists Of Orange County enrolled in Medicare?
Yes. Emergency Medicine Specialists Of Orange County is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Emergency Medicine Specialists Of Orange County?
According to the CMS Revalidation Reassignment List (October 2026 release), 97 clinicians in 4 Medicare specialties reassign their Medicare billing to Emergency Medicine Specialists Of Orange County. A 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 the clinician's services. The largest specialties are Emergency Medicine (60), Pediatric Medicine (30) and Nurse Practitioner (6). Of these, 15 practice at this address and 31 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Emergency Medicine Specialists Of Orange County was last updated on August 1, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Emergency Medicine Specialists Of Orange County · NPI 1740214733
Emergency Medicine organization in Orange, California. Organization record, active in the CMS NPPES registry since July 10, 2006.
## Identity
- **NPI:** 1740214733 (Entity type: Organization)
- **Enumerated:** July 10, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **Organization subpart:** No
- **Authorized official:** Matthew Mullarky, MANAGING PARTNER
## Practice location
- **Address:** 1100 WEST STEWART DR, Orange, CA 92868-3849
- **Phone:** (714) 633-9111
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 97 clinicians in 4 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Emergency Medicine (60), Pediatric Medicine (30), Nurse Practitioner (6); 15 practice at this address and 31 within 10 miles; [full list](https://npiprofile.com/npi/1740214733/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 1, 2022
- **Other identifiers:** Medicaid GR0044120 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1740214733) · Data from the CMS NPPES public registry.