Brian C. McMorrow, MD
NPI 1851391890ActiveIndividual· Internal Medicine, Gastroenterology· Chesterfield, MO
Internal Medicine, Gastroenterology (MD) in Chesterfield, Missouri, trained at Saint Louis University School of Medicine (class of 1992). Their prescriptions cost Medicare Part D more than their services did: $406,389 for 1,165 claims, against $210,851 paid for services in 2024. Janssen Biotech, Inc. was the largest of 3 companies reporting payments in 2025, $142.87 in all, mostly education.
Overview
| NPI | 1851391890 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 29, 2005 |
| Last updated in NPPES | Oct 21, 2026 |
| Certified by provider | Oct 21, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 101547 | MO |
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 (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 408 |
|---|---|
| Services billed | 7,273 across 48 procedure codes |
| Paid by Medicare | $210,851 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,165 · 2,505 30-day fills |
|---|---|
| Patients | 428 |
| Total drug cost | $406,389 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Saint Louis University School of Medicine |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- Gateway Gastroenterology IncChesterfield, MO · 25 clinicians
Hospital affiliation
- St Lukes HospitalChesterfield, MO
Industry payments (Open Payments)
- 2025$142.87 · 3 payments from 3 companies
- 2024$27.44 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $84.00 | 1 |
| Genzyme Corporation | $31.68 | 1 |
| Abbvie Inc. | $27.19 | 1 |
What the 2025 payments were for
- Education$84.00 · 1 payment
- Food and Beverage$58.87 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 26 gastroenterologists in Chesterfield · All gastroenterologists in Missouri