Zahoor A. Makhdoom, MD
NPI 1982667309ActiveIndividual· Internal Medicine, Gastroenterology· Carbondale, IL
Internal Medicine, Gastroenterology (MD) with Southern Illinois Gi Specialists LLC, practicing in Carbondale, Illinois. In 2024 Medicare paid $1,263,229 for 951 patients, and Part D covered 5,618 of their prescriptions, 85% of them generic. Abbvie Inc. was the largest of 7 companies reporting payments in 2025, $520.30 in all, mostly food and beverage. Lists Franklin Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1982667309 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Apr 7, 2006 |
| Last updated in NPPES | Aug 12, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 036094155 | 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 | 951 |
|---|---|
| Services billed | 16,099 across 65 procedure codes |
| Paid by Medicare | $1,263,229 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,618 · 8,460 30-day fills |
|---|---|
| Patients | 1,481 |
| Total drug cost | $764,171 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical group
- Southern Illinois Gi Specialists LLCCarbondale, IL · 4 clinicians
Hospital affiliations
- Franklin HospitalBenton, IL
- Heartland Regional Medical CenterMarion, IL
- Herrin HospitalHerrin, IL
- Marshall Browning HospitalDu Quoin, IL
- St Joseph Memorial HospitalMurphysboro, IL
Industry payments (Open Payments)
- 2025$520.30 · 27 payments from 7 companies
- 2024$502.70 · 21 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $311.38 | 18 |
| Genzyme Corporation | $99.08 | 4 |
| Lilly USA, LLC | $27.32 | 1 |
| Pharmacosmos Therapeutics Inc. | $22.03 | 1 |
| Boston Scientific Corporation | $20.72 | 1 |
What the 2025 payments were for
- Food and Beverage$520.30 · 27 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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