MRS. GWYNETH LEIGH HOLDERBY DNP
NPI 1124447305
Nurse Practitioner - Family in Alva, OK
About Mrs. Gwyneth Leigh Holderby Dnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MRS. GWYNETH LEIGH HOLDERBY DNP (NPI 1124447305) is an individual family provider in Alva, Oklahoma, licensed in Oklahoma (96130) and active in the NPI registry since April 2014. She is enrolled in Medicare PECOS, is affiliated with St Mary's Regional Medical Center, and is a graduate of Other (2014).
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
Mrs. Gwyneth Leigh Holderby Dnp 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 Gwyneth Holderby reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Alva, OK 73717
- Reassigned Medicare billing, Oklahoma enrollment
- 23 clinicians in this Medicare group
Nichols Hills, OK 73116
- Reassigned Medicare billing, Oklahoma enrollment
- 6 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
St Mary's Regional Medical Center
Acute Care Hospitals · Enid, OKShare Medical Center
Critical Access Hospitals · Alva, OKPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 73717 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 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ALVA, OK 73717
ALVA, OK 73717
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 Gwyneth Holderby's NPI number?
The NPI number for Gwyneth Holderby is 1124447305. It was assigned to this individual provider in the NPPES registry on April 15, 2014.
Where is Gwyneth Holderby located?
Gwyneth Holderby practices at 709 Oklahoma Blvd, Alva, OK 73717. The listed phone number is (580) 327-8434.
What is Gwyneth Holderby's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Gwyneth Holderby enrolled in Medicare?
Yes. Gwyneth Holderby 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 Gwyneth Holderby's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gwyneth Holderby reassigns Medicare benefits to 2 organizations: Alva Hospital Authority (Alva, OK) and Enhanced Wound Care LLC (Nichols Hills, 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 Gwyneth Holderby's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gwyneth Holderby 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 2 other insurers list Gwyneth Holderby 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 Gwyneth Holderby affiliated with any hospitals?
According to CMS data, Gwyneth Holderby is affiliated with St Mary's Regional Medical Center and Share Medical Center.
When was this NPI record last updated?
The NPPES record for Gwyneth Holderby was last updated on July 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Mrs. Gwyneth Leigh Holderby, DNP · NPI 1124447305
Family physician in Alva, Oklahoma. Individual provider, active in the CMS NPPES registry since April 15, 2014.
## Identity
- **NPI:** 1124447305 (Entity type: Individual)
- **Enumerated:** April 15, 2014
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 96130 (Oklahoma)
- **Sole proprietor:** No
## Practice location
- **Address:** 709 OKLAHOMA BLVD, Alva, OK 73717-2749
- **Phone:** (580) 327-8434
## 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): Alva Hospital Authority (NPI 1447413422, Alva, OK); Enhanced Wound Care LLC (NPI 1306594148, Nichols Hills, OK) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2014
## Record status
- **NPPES last updated:** July 21, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1124447305) · Data from the CMS NPPES public registry.