Gregory M. Keelen, DO
NPI 1811905227ActiveIndividual· Emergency Medicine· Denison, TX
Emergency Medicine (DO) in Denison, Texas, trained at University of Kansas School of Med (Kc/Wich/Sal) (class of 2003). 651 Medicare patients in 2024, $83,540 paid; nearly all of their 894 Part D prescriptions were generic (95%). Inari Medical, Inc. was the largest of 3 companies reporting payments in 2024, $387.42 in all, mostly food and beverage.
Overview
| NPI | 1811905227 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Aug 3, 2006 |
| Last updated in NPPES | Jan 22, 2024 |
| Certified by provider | Jan 19, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | M1822 | 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 - Emergency Medicine (OK); Practitioner - Emergency Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 651 |
|---|---|
| Services billed | 749 across 28 procedure codes |
| Paid by Medicare | $83,540 |
Part D prescriptions in 2024
| Prescriptions (claims) | 894 · 902 30-day fills |
|---|---|
| Patients | 444 |
| Total drug cost | $6,960 |
| Generic share | 95% of claims |
Education and affiliations
| Medical school | University of Kansas School of Med (Kc/Wich/Sal) |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Emergency Medicine |
Medical groups
- Ies Central Texas PLLCHillsboro, TX · 34 clinicians
- Level One Emergency Physicians LLCDenison, TX · 29 clinicians
Hospital affiliations
- Saint Francis Hospital MuskogeeMuskogee, OK
- Saint Francis Hospital South, LLCTulsa, OK
- Saint Francis Hospital, IncTulsa, OK
- Texoma Medical CenterDenison, TX
Industry payments (Open Payments)
- 2024$387.42 · 5 payments from 3 companies
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Inari Medical, Inc. | $169.63 | 1 |
| Medtronic, Inc. | $134.75 | 3 |
| Abiomed | $83.04 | 1 |
What the 2024 payments were for
- Food and Beverage$387.42 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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