Dr. Gregory C. Thom, M.D.
Vascular Surgery (Vascular Surgery Physician)
- Medicare participating
At a glance
- Medical school
- Medical College of Wisconsin (2009)
- Years since graduation
- 17
- In the NPI registry since
- 2009
- Medicare patients seen, 2024
- 188
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. What an NPI is
Education and training
- 2009Medical school: Medical College of Wisconsin
- 2009Registered with an NPI (national billing number; not a license date)
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
-
Vascular Surgery Physician primary
WI license 65518-20 -
Surgery Physician
WI license 65518-20
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Aurora Baycare Medical Ctr Green Bay, WI
- Aurora Medical Center Bay Area Marinette, WI
- Aurora Medical Ctr Manitowoc County Two Rivers, WI
Medical groups
- Baycare Aurora LLC (194 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
- 188
- Services billed
- 450
- Patients’ average age
- 73
| Service | Times | Patients |
|---|---|---|
| Established patient office or other outpatient visit, 20-29 minutes | 101 | 93 |
| New patient office or other outpatient visit, 45-59 minutes | 49 | 49 |
| Established patient office or other outpatient visit, 30-39 minutes | 33 | 30 |
| New patient office or other outpatient visit, 30-44 minutes | 22 | 22 |
| Ultrasonic guidance for blood vessel access | 16 | 15 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 14 | 14 |
| Review by radiologist of arm or leg artery image | 13 | 11 |
| Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes | 13 | 11 |
| Removal of blood clot and portion of chest, neck, or brain artery | 11 | 11 |
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 |
|---|---|
| Cilostazol Other prescribers in Green Bay, WI | 49 |
| Atorvastatin Calcium Other prescribers in Green Bay, WI | 33 |
| Clopidogrel (clopidogrel bisulfate) Other prescribers in Green Bay, WI | 22 |
| Eliquis (apixaban) Other prescribers in Green Bay, WI | 15 |
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, 2 companies reported 4 payments worth $393 in total to this clinician.
| Cook Medical LLC | $199 |
|---|---|
| Boston Scientific Corporation | $194 |
| Food and Beverage | $393 |
|---|
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.