Constantine John Tsamasfyros, M.D.
NPI 1114989332ActiveIndividual· Family Medicine· Denver, CO
Family Medicine (M.D.) in Denver, Colorado, trained at University of Missouri, Columbia School of Medicine (class of 1970). Their prescriptions cost Medicare Part D more than their services did: $379,926 for 4,476 claims, against $49,625 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 12 companies reporting payments in 2025, $723.96 in all, mostly food and beverage.
Overview
| NPI | 1114989332 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 4, 2006 |
| Last updated in NPPES | Apr 27, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 17165 | CO |
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 (CO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 68 |
|---|---|
| Services billed | 548 across 14 procedure codes |
| Paid by Medicare | $49,625 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,476 · 10,071 30-day fills |
|---|---|
| Patients | 224 |
| Total drug cost | $379,926 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | University of Missouri, Columbia School of Medicine |
|---|---|
| Graduation year | 1970 |
| Medicare specialty | Family Practice |
Hospital affiliation
- HCA Healthone RoseDenver, CO
Industry payments (Open Payments)
- 2025$723.96 · 28 payments from 12 companies
- 2024$1,149 · 54 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $244.01 | 7 |
| Glaxosmithkline, LLC. | $95.63 | 4 |
| Neurocrine Biosciences, Inc. | $83.94 | 3 |
| Amgen Inc. | $78.62 | 4 |
| Teva Pharmaceuticals USA, Inc. | $56.33 | 2 |
What the 2025 payments were for
- Food and Beverage$723.96 · 28 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other family medicine physicians in Denver
- 1003303173
- 1013206622
- 1013925767
- 1033596432
- 1043355241
- 1043380702
- 1043430325
- 1073517843
- 1093799215
- 1093842023
- 1104273556
- 1154768919
All 611 family medicine physicians in Denver · All family medicine physicians in Colorado