Coreen Regina Martinez, MS, RN, NP-C, OCN
NPI 1821639923ActiveIndividual· Nurse Practitioner, Gerontology· Houston, TX
Nurse Practitioner, Gerontology (MS, RN, NP-C, OCN) with Physicians Referral Service, practicing in Houston, Texas. Their prescriptions cost Medicare Part D more than their services did: $874,009 for 853 claims, against $11,763 paid for services in 2024. Genzyme Corporation was the largest of 5 companies reporting payments in 2025, $519.56 in all, mostly food and beverage.
Overview
| NPI | 1821639923 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MS, RN, NP-C, OCN |
| Sole proprietor | No |
| NPI issued | Oct 1, 2019 |
| Last updated in NPPES | Oct 1, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Gerontology Primary | 363LG0600X | AP142239 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nurse Practitioner (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 143 |
|---|---|
| Services billed | 217 across 3 procedure codes |
| Paid by Medicare | $11,763 |
Part D prescriptions in 2024
| Prescriptions (claims) | 853 · 1,752 30-day fills |
|---|---|
| Patients | 197 |
| Total drug cost | $874,009 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Physicians Referral ServiceHouston, TX · 2,765 clinicians
Industry payments (Open Payments)
- 2025$519.56 · 8 payments from 5 companies
- 2024$279.36 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $125.36 | 4 |
| Astrazeneca Pharmaceuticals LP | $125.25 | 1 |
| Puma Biotechnology, Inc. | $124.47 | 1 |
| Daiichi Sankyo Inc. | $123.05 | 1 |
| Kyowa Kirin, Inc. | $21.43 | 1 |
What the 2025 payments were for
- Food and Beverage$519.56 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 253 gerontology nurse practitioners in Houston · All gerontology nurse practitioners in Texas