Marcia L. Diaz, ARNP
NPI 1558347328ActiveIndividual· Nurse Practitioner, Family· Vinita, OK
Nurse Practitioner, Family (ARNP) with Warren Clinic Inc, practicing in Vinita, Oklahoma. Their prescriptions cost Medicare Part D more than their services did: $407,625 for 6,231 claims, against $30,529 paid for services in 2024. Dexcom, Inc. was the largest of 2 companies reporting payments in 2025, $30.40 in all, mostly food and beverage. Lists Saint Francis Hospital Vinita, Inc and 1 other hospital as hospital affiliations.
Overview
| NPI | 1558347328 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | ARNP |
| Sole proprietor | No |
| NPI issued | Dec 22, 2005 |
| Last updated in NPPES | Sep 29, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | R0074291 | 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 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 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 | 236 |
|---|---|
| Services billed | 1,435 across 34 procedure codes |
| Paid by Medicare | $30,529 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,231 · 11,049 30-day fills |
|---|---|
| Patients | 352 |
| Total drug cost | $407,625 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Warren Clinic IncTulsa, OK · 883 clinicians
Hospital affiliations
- Saint Francis Hospital Vinita, IncVinita, OK
- Saint Francis Hospital, IncTulsa, OK
Industry payments (Open Payments)
- 2025$30.40 · 2 payments from 2 companies
- 2024$130.55 · 7 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Dexcom, Inc. | $16.18 | 1 |
| Lundbeck LLC | $14.22 | 1 |
What the 2025 payments were for
- Food and Beverage$30.40 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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