John Martin Vainder, MD
NPI 1508858226ActiveIndividual· Internal Medicine, Gastroenterology· Evanston, IL
Internal Medicine, Gastroenterology (MD) in Evanston, Illinois, licensed in IL, with an NPI issued in August 2005. Their prescriptions cost Medicare Part D more than their services did: $168,232 for 627 claims, against $60,510 paid for services in 2024. Janssen Biotech, Inc. was the largest of 8 companies reporting payments in 2024, $293.36 in all, mostly food and beverage.
Overview
| NPI | 1508858226 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 18, 2005 |
| Last updated in NPPES | Feb 19, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 036-057977 | IL |
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 (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 342 |
|---|---|
| Services billed | 921 across 19 procedure codes |
| Paid by Medicare | $60,510 |
Part D prescriptions in 2024
| Prescriptions (claims) | 627 · 1,172 30-day fills |
|---|---|
| Patients | 299 |
| Total drug cost | $168,232 |
| Generic share | 85% of claims |
Industry payments (Open Payments)
- 2024$293.36 · 16 payments from 8 companies
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $63.10 | 4 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $54.22 | 3 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $47.91 | 2 |
| Takeda Pharmaceuticals U.S.A., Inc. | $35.89 | 2 |
| Abbvie Inc. | $33.78 | 2 |
What the 2024 payments were for
- Food and Beverage$293.36 · 16 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 19 gastroenterologists in Evanston · All gastroenterologists in Illinois