Gregory Alan Ennis, MD
NPI 1043255615ActiveIndividual· Family Medicine· Plano, TX
Family Medicine (MD) with Catalyst Physician Group - Ntx, PLLC, practicing in Plano, Texas. Their prescriptions cost Medicare Part D more than their services did: $390,078 for 5,466 claims, against $88,899 paid for services in 2024. Novo Nordisk Inc was the largest of 21 companies reporting payments in 2025, $1,218 in all, mostly food and beverage. Lists Medical Center of McKinney and 1 other hospital as hospital affiliations.
Overview
| NPI | 1043255615 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 18, 2006 |
| Last updated in NPPES | Dec 16, 2025 |
| Certified by provider | Dec 16, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | K5292 | 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 - Family Practice (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 335 |
|---|---|
| Services billed | 1,636 across 57 procedure codes |
| Paid by Medicare | $88,899 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,466 · 12,271 30-day fills |
|---|---|
| Patients | 490 |
| Total drug cost | $390,078 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 1997 |
|---|---|
| Medicare specialty | Family Practice |
| Telehealth | Offers telehealth |
Medical group
- Catalyst Physician Group - Ntx, PLLCMansfield, TX · 86 clinicians
Hospital affiliations
- Medical Center of McKinneyMcKinney, TX
- Medical City PlanoPlano, TX
Industry payments (Open Payments)
- 2025$1,218 · 76 payments from 21 companies
- 2024$1,495 · 110 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $265.13 | 12 |
| Astrazeneca Pharmaceuticals LP | $199.73 | 26 |
| Bayer Healthcare Pharmaceuticals Inc. | $97.73 | 5 |
| Astellas Pharma US Inc | $84.07 | 4 |
| Corium, LLC | $81.82 | 3 |
What the 2025 payments were for
- Food and Beverage$1,218 · 76 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 223 family medicine physicians in Plano · All family medicine physicians in Texas