Gregory A. Merritt, MD
NPI 1548266174ActiveIndividual· Internal Medicine, Gastroenterology· Kansas City, MO
Internal Medicine, Gastroenterology (MD) in Kansas City, Missouri, trained at University of Kansas School of Med (Kc/Wich/Sal) (class of 1991). Their prescriptions cost Medicare Part D more than their services did: $509,849 for 1,769 claims, against $113,777 paid for services in 2024. Abbvie Inc. was the largest of 18 companies reporting payments in 2025, $2,891 in all, mostly food and beverage.
Overview
| NPI | 1548266174 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 28, 2005 |
| Last updated in NPPES | Mar 27, 2025 |
| Certified by provider | Mar 27, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 110178 | MO |
| Internal Medicine, Gastroenterology | 207RG0100X | 26299 | KS |
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 (KS); Practitioner - Gastroenterology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 511 |
|---|---|
| Services billed | 1,158 across 37 procedure codes |
| Paid by Medicare | $113,777 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,769 · 3,226 30-day fills |
|---|---|
| Patients | 461 |
| Total drug cost | $509,849 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | University of Kansas School of Med (Kc/Wich/Sal) |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Kansas City Gastroenterology and Hepatology Physicians Group LLCCameron, MO · 17 clinicians
Hospital affiliations
- Belton Regional Medical CenterBelton, MO
- Centerpoint Medical CenterIndependence, MO
- Lafayette Regional Health CenterLexington, MO
- Lee's Summit Medical CenterLees Summit, MO
- Research Medical CenterKansas City, MO
Industry payments (Open Payments)
- 2025$2,891 · 146 payments from 18 companies
- 2024$3,574 · 172 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $731.55 | 40 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $357.73 | 19 |
| Qol Medical, LLC | $274.23 | 7 |
| Janssen Biotech, Inc. | $258.17 | 8 |
| Lilly USA, LLC | $211.02 | 9 |
What the 2025 payments were for
- Food and Beverage$2,891 · 146 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 52 gastroenterologists in Kansas City · All gastroenterologists in Missouri