Ryan Robert McWilliams, MD
NPI 1326214727ActiveIndividual· Internal Medicine, Gastroenterology· Greeley, CO
Internal Medicine, Gastroenterology (MD) in Greeley, Colorado, trained at University of Colorado School of Medicine, Denver (class of 2008). Their prescriptions cost Medicare Part D more than their services did: $286,389 for 490 claims, against $42,849 paid for services in 2024. Abbvie Inc. was the largest of 15 companies reporting payments in 2025, $633.12 in all, mostly food and beverage.
Overview
| NPI | 1326214727 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 6, 2008 |
| Last updated in NPPES | Apr 26, 2021 |
| Certified by provider | Apr 26, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 51550 | CO |
| Internal Medicine | 207R00000X | DR.0051550 | CO |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - Gastroenterology (CO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 239 |
|---|---|
| Services billed | 417 across 29 procedure codes |
| Paid by Medicare | $42,849 |
Part D prescriptions in 2024
| Prescriptions (claims) | 490 · 837 30-day fills |
|---|---|
| Patients | 266 |
| Total drug cost | $286,389 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | University of Colorado School of Medicine, Denver |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical groups
- Portercare Adventist Health SystemDenver, CO · 774 clinicians
- Peak Gastroenterology AssociatesColorado Springs, CO · 33 clinicians
Hospital affiliations
- Adventhealth Castle RockCastle Rock, CO
- Adventhealth LittletonLittleton, CO
- Adventhealth ParkerParker, CO
Industry payments (Open Payments)
- 2025$633.12 · 35 payments from 15 companies
- 2024$129.28 · 6 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $186.23 | 14 |
| Regeneron Healthcare Solutions, Inc. | $56.03 | 2 |
| Janssen Biotech, Inc. | $54.83 | 2 |
| Madrigal Pharmaceuticals | $54.06 | 2 |
| Aimmune Therapeutics, Inc. | $53.13 | 3 |
What the 2025 payments were for
- Food and Beverage$633.12 · 35 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Gastroenterology providers in Greeley
- 1629295043
- 1669578464
- 1184144230
- 1073933941
- 1215198817
- 1033197900
- 1013113547
- 1285072587
- 1144540477
All Internal Medicine, Gastroenterology providers in Colorado →