GARY WAYNE COX II DO
NPI 1366022790
Emergency Medicine in Oklahoma City, OK
About Gary Wayne Cox Ii Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GARY WAYNE COX II DO (NPI 1366022790) is an individual emergency medicine provider in Oklahoma City, Oklahoma, licensed in Oklahoma (7633) and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS, is affiliated with Chickasaw Nation Medical Center, and is a graduate of Oklahoma State University College Of Osteopathic Medicine (2021).
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
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
Gary Wayne Cox Ii 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
4Medicare enrollment records show Gary Cox reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Oklahoma City, OK 73102
- Reassigned Medicare billing, Oklahoma enrollment
- Medicare enrollment name: Emergency Physicians Of Mid-America PC
- 310 clinicians in this Medicare group
Purcell, OK 73080
- Reassigned Medicare billing, Texas enrollment
- Medicare enrollment name: Chickasaw Nation Division Of Health Chickasaw Nation Medical Center
- 324 clinicians in this Medicare group
Stillwater, OK 74074
- Reassigned Medicare billing, Oklahoma enrollment
- 298 clinicians in this Medicare group
Duncan, OK 73533
- Reassigned Medicare billing, Oklahoma enrollment
- 37 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 2
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.
Chickasaw Nation Medical Center
Acute Care Hospitals · Ada, OKPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 73109 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
OKLAHOMA CITY, OK 73109
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 Gary Cox's NPI number?
The NPI number for Gary Cox is 1366022790. It was assigned to this individual provider in the NPPES registry on April 9, 2021.
Where is Gary Cox located?
Gary Cox practices at 4401 S Western Ave, Oklahoma City, OK 73109. The listed phone number is (405) 636-7000.
What is Gary Cox's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Gary Cox enrolled in Medicare?
Yes. Gary Cox 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 Gary Cox's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gary Cox reassigns Medicare benefits to 4 organizations: Emergency Physicians Of Mid-America, P.C. (Oklahoma City, OK), Chickasaw Nation Division Of Health (Purcell, OK), South Central Emergency Services PC (Stillwater, OK) and Hcc Duncan Inc (Duncan, OK). 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 Gary Cox's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gary Cox accept?
Health plans from Blue Cross and Blue Shield of Oklahoma and Oscar Insurance Company list Gary Cox as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Gary Cox affiliated with any hospitals?
According to CMS data, Gary Cox is affiliated with Chickasaw Nation Medical Center.
When was this NPI record last updated?
The NPPES record for Gary Cox was last updated on April 10, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Gary Wayne Cox II, DO · NPI 1366022790
Emergency Medicine physician in Oklahoma City, Oklahoma. Individual provider, active in the CMS NPPES registry since April 9, 2021.
## Identity
- **NPI:** 1366022790 (Entity type: Individual)
- **Enumerated:** April 9, 2021
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 7633 (Oklahoma)
- **Sole proprietor:** No
## Practice location
- **Address:** 4401 S WESTERN AVE, Oklahoma City, OK 73109-3413
- **Phone:** (405) 636-7000
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Emergency Physicians Of Mid-America, P.C. (NPI 1063825297, Oklahoma City, OK); Chickasaw Nation Division Of Health (NPI 1982764395, Purcell, OK); South Central Emergency Services PC (NPI 1558663724, Stillwater, OK); Hcc Duncan Inc (NPI 1013153543, Duncan, OK) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Oklahoma State University College Of Osteopathic Medicine, class of 2021
## Record status
- **NPPES last updated:** April 10, 2024
---
Source: [NPI Profile](https://npiprofile.com/npi/1366022790) · Data from the CMS NPPES public registry.