ROY MACK GREENWAY JR. MD, FACS
NPI 1639219108
Surgery in Oklahoma City, OK
About Roy Mack Greenway Jr. Md, Facs NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ROY MACK GREENWAY JR. MD, FACS (NPI 1639219108) is an individual surgery provider in Oklahoma City, Oklahoma, licensed in Oklahoma (23986) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS, is affiliated with Chickasaw Nation Medical Center, and maintains a secondary practice location in Elk City.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Secondary Practice Location 1
Other Identifiers 1
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
Roy Mack Greenway Jr. Md, Facs 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
2Medicare enrollment records show Roy Greenway reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Oklahoma City, OK 73139
- Reassigned Medicare billing, Oklahoma enrollment
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
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
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 73139 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 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Roy Greenway's NPI number?
The NPI number for Roy Greenway is 1639219108. It was assigned to this individual provider in the NPPES registry on February 7, 2007. The provider is also known as Roy M Greenway MD.
Where is Roy Greenway located?
Roy Greenway practices at 401 SW 80th St Ste 101, Oklahoma City, OK 73139. The listed phone number is (405) 601-5169.
What is Roy Greenway's specialty?
The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.
Is Roy Greenway enrolled in Medicare?
Yes. Roy Greenway 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 Roy Greenway's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Roy Greenway reassigns Medicare benefits to 2 organizations: Roy Greenway Jr MD PLLC (Oklahoma City, OK) and Chickasaw Nation Division Of Health (Purcell, 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 Roy Greenway's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Roy Greenway accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 3 other insurers list Roy Greenway 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 Roy Greenway affiliated with any hospitals?
According to CMS data, Roy Greenway is affiliated with Chickasaw Nation Medical Center.
When was this NPI record last updated?
The NPPES record for Roy Greenway was last updated on November 11, 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.
# Roy Mack Greenway Jr., MD, FACS · NPI 1639219108
Surgery physician in Oklahoma City, Oklahoma. Individual provider, active in the CMS NPPES registry since February 7, 2007.
## Identity
- **NPI:** 1639219108 (Entity type: Individual)
- **Enumerated:** February 7, 2007
- **Primary specialty:** Surgery · taxonomy 208600000X
- **State license:** 23986 (Oklahoma)
- **Sole proprietor:** No
## Practice location
- **Address:** 401 SW 80TH ST STE 101, Oklahoma City, OK 73139-8123
- **Phone:** (405) 601-5169 · **Fax:** (405) 601-9095
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Roy Greenway Jr MD PLLC (NPI 1104546761, Oklahoma City, OK); Chickasaw Nation Division Of Health (NPI 1982764395, Purcell, OK) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Oklahoma College Of Medicine, class of 2004
## Record status
- **NPPES last updated:** November 11, 2022
- **Other identifiers:** Medicaid 200196600A (OK)
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Source: [NPI Profile](https://npiprofile.com/npi/1639219108) · Data from the CMS NPPES public registry.