Brian Blumenstein, MD
NPI 1194784645ActiveIndividual· Internal Medicine, Gastroenterology· Oak Lawn, IL
Internal Medicine, Gastroenterology (MD) in Oak Lawn, Illinois, trained at University of Michigan Medical School (class of 1989). In 2024 Medicare paid $251,934 for 479 patients, and Part D covered 910 of their prescriptions, 86% of them generic. Abbvie Inc. was the largest of 2 companies reporting payments in 2025, $246.90 in all, mostly food and beverage.
Overview
| NPI | 1194784645 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 22, 2006 |
| Last updated in NPPES | Jan 15, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 036082788 | 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 | 479 |
|---|---|
| Services billed | 9,263 across 57 procedure codes |
| Paid by Medicare | $251,934 |
Part D prescriptions in 2024
| Prescriptions (claims) | 910 · 1,826 30-day fills |
|---|---|
| Patients | 260 |
| Total drug cost | $341,667 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | University of Michigan Medical School |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- Illinois Gastroenterology Group LLCArlington Heights, IL · 115 clinicians
Hospital affiliations
- Advocate Christ Hospital & Medical CenterOak Lawn, IL
- Osf Little Company of Mary Medical CenterEvergreen Park, IL
- Palos Community HospitalPalos Heights, IL
Industry payments (Open Payments)
- 2025$246.90 · 16 payments from 2 companies
- 2024$103.76 · 5 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $231.42 | 15 |
| Aimmune Therapeutics, Inc. | $15.48 | 1 |
What the 2025 payments were for
- Food and Beverage$246.90 · 16 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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