Ajay Bajaj, MD
NPI 1518943513ActiveIndividual· Internal Medicine, Gastroenterology· Burbank, IL
Internal Medicine, Gastroenterology (MD) with Gi Partners of Illinois PLLC, practicing in Burbank, Illinois. Their prescriptions cost Medicare Part D more than their services did: $1,568,015 for 2,369 claims, against $250,659 paid for services in 2024. Abbvie Inc. was the largest of 23 companies reporting payments in 2025, $16,094 in all, mostly speaking and faculty fees. Lists Advocate Christ Hospital & Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1518943513 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Dec 21, 2005 |
| Last updated in NPPES | Jun 23, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 036078076 | 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 | 905 |
|---|---|
| Services billed | 2,301 across 82 procedure codes |
| Paid by Medicare | $250,659 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,369 · 3,734 30-day fills |
|---|---|
| Patients | 1,000 |
| Total drug cost | $1,568,015 |
| Generic share | 60% of claims |
Education and affiliations
| Graduation year | 1983 |
|---|---|
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Gi Partners of Illinois PLLCLibertyville, IL · 39 clinicians
Hospital affiliations
- Advocate Christ Hospital & Medical CenterOak Lawn, IL
- Advocate Good Samaritan HospitalDowners Grove, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Osf Little Company of Mary Medical CenterEvergreen Park, IL
- Palos Community HospitalPalos Heights, IL
Other facilities
- Shirley Ryan AbilitylabInpatient rehabilitation facility · Chicago, IL
Industry payments (Open Payments)
- 2025$16,094 · 196 payments from 23 companies
- 2024$9,158 · 159 payments from 27 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $8,689 | 62 |
| Madrigal Pharmaceuticals | $3,915 | 22 |
| Pfizer Inc. | $452.79 | 15 |
| Janssen Biotech, Inc. | $422.22 | 10 |
| Takeda Pharmaceuticals U.S.A., Inc. | $347.64 | 22 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$7,475 · 3 payments
- Food and Beverage$5,890 · 190 payments
- Consulting Fee$2,580 · 1 payment
- Travel and Lodging$148.73 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Gastroenterology providers in Burbank
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All Internal Medicine, Gastroenterology providers in Illinois →