David N. Butler, M.D.
NPI 1083821037ActiveIndividual· Internal Medicine, Gastroenterology· Chicago, IL
Internal Medicine, Gastroenterology (M.D.) in Chicago, Illinois, trained at Wayne State University School of Medicine (class of 1990). Their prescriptions cost Medicare Part D more than their services did: $149,459 for 460 claims, against $34,272 paid for services in 2024. Ardelyx, Inc. was the largest of 3 companies reporting payments in 2025, $338.93 in all, mostly food and beverage.
Overview
| NPI | 1083821037 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | May 17, 2007 |
| Last updated in NPPES | Apr 11, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 036086271 | 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 | 164 |
|---|---|
| Services billed | 324 across 15 procedure codes |
| Paid by Medicare | $34,272 |
Part D prescriptions in 2024
| Prescriptions (claims) | 460 · 564 30-day fills |
|---|---|
| Patients | 155 |
| Total drug cost | $149,459 |
| Generic share | 70% of claims |
Education and affiliations
| Medical school | Wayne State University School of Medicine |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Gastroenterology |
Medical group
- Foundation for Outreach ServicesChicago, IL · 37 clinicians
Hospital affiliations
- Humboldt Park HealthChicago, IL
- Jackson Park HospitalChicago, IL
- South Shore HospitalChicago, IL
- St Bernard HospitalChicago, IL
Industry payments (Open Payments)
- 2025$338.93 · 10 payments from 3 companies
- 2024$374.08 · 13 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ardelyx, Inc. | $184.01 | 3 |
| Pfizer Inc. | $137.42 | 6 |
| Glaxosmithkline, LLC. | $17.50 | 1 |
What the 2025 payments were for
- Food and Beverage$338.93 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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