Clark C. Kulig, MD
NPI 1669423430ActiveIndividual· Internal Medicine, Gastroenterology· Denver, CO
Internal Medicine, Gastroenterology (MD) in Denver, Colorado, trained at University of Wisconsin School of Medicine (class of 1998). Their prescriptions cost Medicare Part D more than their services did: $598,549 for 692 claims, against $19,058 paid for services in 2024. Ipsen Biopharmaceuticals, Inc was the largest of 15 companies reporting payments in 2025, $1,245 in all, mostly food and beverage.
Overview
| NPI | 1669423430 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 15, 2006 |
| Last updated in NPPES | Feb 5, 2025 |
| Certified by provider | Feb 5, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | DR.39951 | CO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (CO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 114 |
|---|---|
| Services billed | 187 across 10 procedure codes |
| Paid by Medicare | $19,058 |
Part D prescriptions in 2024
| Prescriptions (claims) | 692 · 1,107 30-day fills |
|---|---|
| Patients | 112 |
| Total drug cost | $598,549 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | University of Wisconsin School of Medicine |
|---|---|
| Graduation year | 1998 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Portercare Adventist Health SystemDenver, CO · 774 clinicians
Hospital affiliations
- Adventhealth AvistaLouisville, CO
- Adventhealth LittletonLittleton, CO
- Adventhealth ParkerParker, CO
- Adventhealth PorterDenver, CO
Industry payments (Open Payments)
- 2025$1,245 · 28 payments from 15 companies
- 2024$806.11 · 13 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ipsen Biopharmaceuticals, Inc | $335.29 | 9 |
| Medtronic, Inc. | $173.21 | 2 |
| Orphalan Inc | $150.26 | 1 |
| Mallinckrodt Hospital Products Inc. | $142.09 | 2 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $142.08 | 2 |
What the 2025 payments were for
- Food and Beverage$1,245 · 28 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Gastroenterology providers in Denver
- 1669653242
- 1134715360
- 1164269726
- 1396790101
- 1447278981
- 1063387793
- 1033745104
- 1083240915
- 1326674250
- 1629604707
- 1891322756
- 1144407164
All Internal Medicine, Gastroenterology providers in Colorado →