Ronald A. Bloom, MD
NPI 1659353779ActiveIndividual· Internal Medicine, Gastroenterology· Glenview, IL
Internal Medicine, Gastroenterology (MD) with Illinois Gastroenterology Group LLC, practicing in Glenview, Illinois. In 2024 Medicare paid $174,956 for 403 patients, and Part D covered 694 of their prescriptions, 74% of them generic. Ipsen Biopharmaceuticals, Inc was the largest of 9 companies reporting payments in 2025, $629.54 in all, mostly food and beverage. Lists Advocate Lutheran General Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1659353779 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 15, 2005 |
| Last updated in NPPES | Apr 24, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 036094612 | IL |
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 (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 403 |
|---|---|
| Services billed | 5,311 across 43 procedure codes |
| Paid by Medicare | $174,956 |
Part D prescriptions in 2024
| Prescriptions (claims) | 694 · 1,270 30-day fills |
|---|---|
| Patients | 291 |
| Total drug cost | $213,307 |
| Generic share | 74% of claims |
Education and affiliations
| Graduation year | 1994 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical group
- Illinois Gastroenterology Group LLCArlington Heights, IL · 115 clinicians
Hospital affiliations
- Advocate Lutheran General HospitalPark Ridge, IL
- Northshore University Healthsystem - Evanston HospitalEvanston, IL
Industry payments (Open Payments)
- 2025$629.54 · 15 payments from 9 companies
- 2024$232.23 · 11 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ipsen Biopharmaceuticals, Inc | $195.78 | 3 |
| Janssen Biotech, Inc. | $164.54 | 2 |
| Lilly USA, LLC | $58.75 | 2 |
| Ardelyx, Inc. | $56.64 | 2 |
| Pfizer Inc. | $44.09 | 2 |
What the 2025 payments were for
- Food and Beverage$629.54 · 15 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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