Dr. Thomas F. Gregory, M.D.
Medical Oncology (Medical Oncology Physician)
- Medicare participating
At a glance
- Medical school
- University of Texas Medical Branch at Galveston (1993)
- Years since graduation
- 33
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 928
Licensed in Texas since 1995, according to the Texas Medical Board. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 1993Medical school: University of Texas Medical Branch at Galveston
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Medical Oncology Physician primary
TX license J7277 (first issued 1995; active)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Christus Mother Frances Hospital Tyler, TX
- Christus Mother Frances Hospital Sulphur Springs Sulphur Springs, TX
Medical groups
- Texas Oncology PA (1,014 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 928
- Services billed
- 168,597
- Patients’ average age
- 75
| Service | Times | Patients |
|---|---|---|
| Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use) | 20,910 | 33 |
| Injection, pembrolizumab, 1 mg | 17,200 | 38 |
| Injection, nivolumab, 1 mg | 14,460 | 23 |
| Injection, oxaliplatin, 0.5 mg | 11,600 | 21 |
| Injection, paclitaxel, 1 mg | 9,100 | 29 |
| Injection, iron sucrose, 1 mg | 9,000 | 25 |
| Injection, daratumumab, 10 mg and hyaluronidase-fihj | 9,000 | 17 |
| Injection, darbepoetin alfa, 1 microgram (non-esrd use) | 8,209 | 22 |
| Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml | 7,320 | 74 |
| Injection, docetaxel, 1 mg | 3,562 | 20 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Letrozole Other prescribers in Tyler, TX | 134 |
| Anastrozole Other prescribers in Tyler, TX | 94 |
| Hydrocodone-Acetaminophen (hydrocodone/acetaminophen) Other prescribers in Tyler, TX | 56 |
| Xarelto (rivaroxaban) Other prescribers in Tyler, TX | 41 |
| Prednisone Other prescribers in Tyler, TX | 40 |
| Potassium Chloride Other prescribers in Tyler, TX | 39 |
| Hydroxyurea Other prescribers in Tyler, TX | 34 |
| Eliquis (apixaban) Other prescribers in Tyler, TX | 29 |
| Calquence (acalabrutinib maleate) | 28 |
| Jakafi (ruxolitinib phosphate) | 27 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 22 companies reported 73 payments worth $1,545 in total to this clinician.
| AstraZeneca Pharmaceuticals LP | $269 |
|---|---|
| Tempus Ai, Inc | $156 |
| Regeneron Healthcare Solutions, Inc. | $143 |
| E.r. Squibb & Sons, L.l.c. | $137 |
| Pfizer Inc. | $128 |
| Bayer HealthCare Pharmaceuticals Inc. | $113 |
| AbbVie Inc. | $103 |
| Array Biopharma Inc | $69.15 |
| Food and Beverage | $1,545 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.