MARY V MUSTAIN MD
NPI 1235384355
Emergency Medicine in Oklahoma City, OK
About Mary V Mustain Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY V MUSTAIN MD (NPI 1235384355) is an individual emergency medicine provider in Oklahoma City, Oklahoma, licensed in Oklahoma (42757) and active in the NPI registry since November 2008. She is enrolled in Medicare PECOS, is affiliated with Mercy Hospital Oklahoma City, Inc, and is a graduate of University Of Mississippi School Of Medicine (2007).
NPPES Registry Identity
Specialties & Licenses
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
Mary V Mustain Md 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 Mary Mustain reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Oklahoma City, OK 73120
- Reassigned Medicare billing, Oklahoma enrollment
- 975 clinicians in this Medicare group
Conway, AR 72034
- Reassigned Medicare billing, Arkansas enrollment
- 62 clinicians in this Medicare group
Conway, AR 72034
- Reassigned Medicare billing, Arkansas enrollment
- 37 clinicians in this Medicare group
Little Rock, AR 72211
- Reassigned Medicare billing, Arkansas enrollment
- 169 clinicians in this Medicare group
Sherwood, AR 72120
- Reassigned Medicare billing, Arkansas 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.
Areas of Expertise CMS Part B claims 4
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.
Mercy Hospital Oklahoma City, Inc
Acute Care Hospitals · Oklahoma City, OKPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 73120 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 3
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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 73120
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 Mary Mustain's NPI number?
The NPI number for Mary Mustain is 1235384355. It was assigned to this individual provider in the NPPES registry on November 18, 2008.
Where is Mary Mustain located?
Mary Mustain practices at 4300 W Memorial Rd, Oklahoma City, OK 73120. The listed phone number is (405) 752-3715.
What is Mary Mustain's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Mary Mustain enrolled in Medicare?
Yes. Mary Mustain 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 Mary Mustain's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Mustain reassigns Medicare benefits to 5 organizations: Mercy Clinic Oklahoma Communities (Oklahoma City, OK), Conway Regional Medical Center Inc (Conway, AR), Faulkner Emergency Group, PLLC (Conway, AR), Arkansas Heart Hospital, LLC (Little Rock, AR) and Shiloh Emergency Group PLLC (Sherwood, AR). 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 Mary Mustain's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Mustain accept?
Health plans from Blue Cross and Blue Shield of Oklahoma list Mary Mustain 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 Mary Mustain affiliated with any hospitals?
According to CMS data, Mary Mustain is affiliated with Mercy Hospital Oklahoma City, Inc.
When was this NPI record last updated?
The NPPES record for Mary Mustain was last updated on January 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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.
# Mary V Mustain, MD · NPI 1235384355
Emergency Medicine physician in Oklahoma City, Oklahoma. Individual provider, active in the CMS NPPES registry since November 18, 2008.
## Identity
- **NPI:** 1235384355 (Entity type: Individual)
- **Enumerated:** November 18, 2008
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 42757 (Oklahoma)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 4300 W MEMORIAL RD, Oklahoma City, OK 73120-8304
- **Phone:** (405) 752-3715 · **Fax:** (405) 936-5058
## 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): Mercy Clinic Oklahoma Communities (NPI 1386874550, Oklahoma City, OK); Conway Regional Medical Center Inc (NPI 1417024662, Conway, AR); Faulkner Emergency Group, PLLC (NPI 1083279533, Conway, AR); Arkansas Heart Hospital, LLC (NPI 1558653212, Little Rock, AR); Shiloh Emergency Group PLLC (NPI 1205458189, Sherwood, AR) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Mississippi School Of Medicine, class of 2007
## Record status
- **NPPES last updated:** January 2, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1235384355) · Data from the CMS NPPES public registry.