Dr. Gregory M. Day
General Surgery (Surgical Critical Care Physician)
1400 E Boulder St Ste 600
Colorado Springs, CO 80909
Who else practices at this address →
El Paso County is a federal mental health shortage area. About shortage areas
- Medicare participating
At a glance
- Years since graduation
- 15
- In the NPI registry since
- 2011
- Medicare patients seen, 2024
- 121
Licensed in Colorado since 2017, according to the Colorado Department of Regulatory Agencies. 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. What an NPI is
Education and training
- 2011Registered with an NPI (national billing number; not a license date)
Medicare’s Care Compare data doesn’t list this clinician’s medical school. 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
-
Surgical Critical Care Physician primary
CO license DR.0058888 (first issued 2017; active) -
Surgery Physician
CO license DR.0058888 (first issued 2017; active) · IL license 125059546
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Uch-Memorial Health System Colorado Springs, CO
- Uchealth Highlands Ranch Hospital Highlands Ranch, CO
Medical groups
- Poudre Valley Medical Group LLC (2,440 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
- 121
- Services billed
- 312
- Patients’ average age
- 76
| Service | Times | Patients |
|---|---|---|
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 32 | 32 |
| Critical care, first 30-74 minutes | 26 | 19 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 21 | 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.
Payments from drug and device companies
In 2025, 1 companies reported 4 payments worth $135 in total to this clinician.
| Medical Device Business Services, Inc. | $135 |
|---|
| Food and Beverage | $120 |
|---|---|
| Travel and Lodging | $15.00 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Medical Device Business Services, Inc. Nov 7, 2025 | Travel and Lodging MATRIXRIB · CMF-Trauma · travel to AURORA, CO · in-kind | $15.00 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
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.