Gwyneth Leigh Holderby, DNP
NPI 1124447305ActiveIndividual· Nurse Practitioner, Family· Alva, OK
Nurse Practitioner, Family (DNP) with Alva Hospital Authority, practicing in Alva, Oklahoma. Their prescriptions cost Medicare Part D more than their services did: $60,474 for 753 claims, against $25,389 paid for services in 2024. Xeris Pharmaceuticals, Inc. was the largest of 2 companies reporting payments in 2025, $242.47 in all, mostly food and beverage. Lists Share Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1124447305 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DNP |
| Sole proprietor | No |
| NPI issued | Apr 15, 2014 |
| Last updated in NPPES | Jul 21, 2026 |
| Certified by provider | Jul 21, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | 96130 | OK |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nurse Practitioner (OK) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 35 |
|---|---|
| Services billed | 156 across 15 procedure codes |
| Paid by Medicare | $25,389 |
Part D prescriptions in 2024
| Prescriptions (claims) | 753 · 1,730 30-day fills |
|---|---|
| Patients | 88 |
| Total drug cost | $60,474 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 2014 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Alva Hospital AuthorityAlva, OK · 14 clinicians
Hospital affiliations
- Share Medical CenterAlva, OK
- St Mary's Regional Medical CenterEnid, OK
Industry payments (Open Payments)
- 2025$242.47 · 2 payments from 2 companies
- 2024$30.46 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Xeris Pharmaceuticals, Inc. | $123.83 | 1 |
| Sanofi-Aventis U.S. LLC | $118.64 | 1 |
What the 2025 payments were for
- Food and Beverage$242.47 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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