Mary Katherine Hearne, APN
NPI 1639609852ActiveIndividual· Nurse Practitioner· San Marcos, TX
Nurse Practitioner (APN) with St Davids Heart and Vascular PLLC, practicing in San Marcos, Texas. Their prescriptions cost Medicare Part D more than their services did: $138,123 for 896 claims, against $8,196 paid for services in 2024. Amgen Inc. was the largest of 2 companies reporting payments in 2025, $31.31 in all, mostly food and beverage. Lists Christus Santa Rosa Hospital-San Marcos and 1 other hospital as hospital affiliations.
Overview
| NPI | 1639609852 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | APN |
| Sole proprietor | No |
| NPI issued | Jun 20, 2017 |
| Last updated in NPPES | Jan 13, 2026 |
| Certified by provider | Jan 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | AP132131 | TX |
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 (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 93 |
|---|---|
| Services billed | 117 across 8 procedure codes |
| Paid by Medicare | $8,196 |
Part D prescriptions in 2024
| Prescriptions (claims) | 896 · 1,947 30-day fills |
|---|---|
| Patients | 214 |
| Total drug cost | $138,123 |
| Generic share | 82% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- St Davids Heart and Vascular PLLCCedar Park, TX · 203 clinicians
Hospital affiliations
- Christus Santa Rosa Hospital-San MarcosSan Marcos, TX
- St David's Medical CenterAustin, TX
Industry payments (Open Payments)
- 2025$31.31 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $15.82 | 1 |
| Pfizer Inc. | $15.49 | 1 |
What the 2025 payments were for
- Food and Beverage$31.31 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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