Gregory John Starsiak Jr., DO
NPI 1578025367ActiveIndividual· Family Medicine· Thornton, CO
Family Medicine (DO) in Thornton, Colorado, trained at Kansas City University of Med & Biosciences, College of Osteo Med (class of 2019). Their prescriptions cost Medicare Part D more than their services did: $68,363 for 639 claims, against $21,426 paid for services in 2024. Abbott Laboratories was the largest of 2 companies reporting payments in 2025, $42.93 in all, mostly food and beverage.
Overview
| NPI | 1578025367 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | Yes |
| NPI issued | Apr 2, 2019 |
| Last updated in NPPES | Jun 28, 2023 |
| Certified by provider | Jun 28, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | DR.0070915 | 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 | 112 |
|---|---|
| Services billed | 1,508 across 39 procedure codes |
| Paid by Medicare | $21,426 |
Part D prescriptions in 2024
| Prescriptions (claims) | 639 · 1,365 30-day fills |
|---|---|
| Patients | 134 |
| Total drug cost | $68,363 |
| Generic share | 82% of claims |
Education and affiliations
| Medical school | Kansas City University of Med & Biosciences, College of Osteo Med |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | Family Practice |
Medical group
- Catholic Health Initiatives ColoradoLakewood, CO · 1,225 clinicians
Hospital affiliation
- Centura Health-St Anthony North Health CampusWestminster, CO
Industry payments (Open Payments)
- 2025$42.93 · 2 payments from 2 companies
- 2024$104.64 · 5 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbott Laboratories | $22.80 | 1 |
| Novo Nordisk Inc | $20.13 | 1 |
What the 2025 payments were for
- Food and Beverage$42.93 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 63 family medicine physicians in Thornton · All family medicine physicians in Colorado