Gareth R. Weiner, MD
NPI 1003845249ActiveIndividual· Internal Medicine, Gastroenterology· Thornton, CO
Internal Medicine, Gastroenterology (MD) in Thornton, Colorado, trained at University of Colorado School of Medicine, Denver (class of 1988). Their prescriptions cost Medicare Part D more than their services did: $69,767 for 603 claims, against $44,691 paid for services in 2024. Takeda Pharmaceuticals U.S.A., Inc. was the largest of 24 companies reporting payments in 2025, $77,972 in all, mostly speaking and faculty fees.
Overview
| NPI | 1003845249 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 1, 2006 |
| Last updated in NPPES | Nov 9, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 29683 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (CO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 274 |
|---|---|
| Services billed | 359 across 23 procedure codes |
| Paid by Medicare | $44,691 |
Part D prescriptions in 2024
| Prescriptions (claims) | 603 · 894 30-day fills |
|---|---|
| Patients | 376 |
| Total drug cost | $69,767 |
| Generic share | 70% of claims |
Education and affiliations
| Medical school | University of Colorado School of Medicine, Denver |
|---|---|
| Graduation year | 1988 |
| Medicare specialty | Gastroenterology |
Medical group
- Rocky Mountain Gastroenterology Associates, PLLCThornton, CO · 36 clinicians
Hospital affiliations
- Centura Health-St Anthony North Health CampusWestminster, CO
- HCA Healthone Mountain RidgeThornton, CO
Industry payments (Open Payments)
- 2025$77,972 · 184 payments from 24 companies
- 2024$54,689 · 162 payments from 22 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Takeda Pharmaceuticals U.S.A., Inc. | $30,820 | 55 |
| Pfizer Inc. | $26,883 | 30 |
| Genzyme Corporation | $13,468 | 14 |
| Janssen Biotech, Inc. | $2,266 | 11 |
| Regeneron Healthcare Solutions, Inc. | $2,248 | 8 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$61,701 · 13 payments
- Travel and Lodging$10,215 · 49 payments
- Food and Beverage$3,822 · 120 payments
- Consulting Fee$2,235 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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