Rishi Singh Grewal, MD
NPI 1417054404ActiveIndividual· Internal Medicine, Gastroenterology· Overland Park, KS
Internal Medicine, Gastroenterology (MD) with Cotton-O'Neil Clinic Revocable Trust and 4 other groups, practicing in Overland Park, Kansas. In 2024 Medicare paid $106,861 for 616 patients, and Part D covered 515 of their prescriptions, 69% of them generic. Genzyme Corporation was the largest of 16 companies reporting payments in 2025, $1,122 in all, mostly food and beverage. Lists Adventhealth Shawnee Mission and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1417054404 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 20, 2006 |
| Last updated in NPPES | Dec 1, 2025 |
| Certified by provider | Dec 1, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 2010006692 | MO |
| Internal Medicine, Gastroenterology | 207RG0100X | 036-121465 | IL |
| Internal Medicine, Gastroenterology | 207RG0100X | 04-45135 | KS |
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 - Gastroenterology (KS); Practitioner - Gastroenterology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 616 |
|---|---|
| Services billed | 1,227 across 46 procedure codes |
| Paid by Medicare | $106,861 |
Part D prescriptions in 2024
| Prescriptions (claims) | 515 · 695 30-day fills |
|---|---|
| Patients | 275 |
| Total drug cost | $85,254 |
| Generic share | 69% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical groups
- Cotton-O'Neil Clinic Revocable TrustTopeka, KS · 666 clinicians
- Meritas Health CorporationKansas City, MO · 502 clinicians
- Shawnee Mission Medical Center IncLenexa, KS · 286 clinicians
- Golden Valley Memorial Hospital DistrictClinton, MO · 139 clinicians
- Carroll County Memorial HospitalCarrollton, MO · 67 clinicians
Hospital affiliations
- Adventhealth Shawnee MissionShawnee Mission, KS
- Adventhealth South Overland Park, IncOverland Park, KS
- Carroll County Memorial HospitalCarrollton, MO
- Nkc HealthNorth Kansas City, MO
- Stormont Vail HospitalTopeka, KS
Industry payments (Open Payments)
- 2025$1,122 · 36 payments from 16 companies
- 2024$904.78 · 34 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $247.29 | 4 |
| Janssen Biotech, Inc. | $211.30 | 2 |
| Abbvie Inc. | $163.74 | 10 |
| Pfizer Inc. | $103.21 | 6 |
| Merit Medical Systems Inc | $74.03 | 1 |
What the 2025 payments were for
- Food and Beverage$1,045 · 35 payments
- Education$76.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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