Sameer Mirza Mazhar, M.D.
NPI 1497932461ActiveIndividual· Internal Medicine, Gastroenterology· Aurora, IL
Internal Medicine, Gastroenterology (M.D.) in Aurora, Illinois, trained at Northwestern University Feinberg Medical School (class of 2002). Their prescriptions cost Medicare Part D more than their services did: $192,201 for 707 claims, against $89,488 paid for services in 2024. Janssen Biotech, Inc. was the largest of 2 companies reporting payments in 2025, $390.02 in all, mostly food and beverage.
Overview
| NPI | 1497932461 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jan 22, 2008 |
| Last updated in NPPES | Nov 18, 2021 |
| Certified by provider | Nov 18, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 036-114152 | IL |
| Internal Medicine | 207R00000X | 95975 | CA |
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 | 362 |
|---|---|
| Services billed | 802 across 33 procedure codes |
| Paid by Medicare | $89,488 |
Part D prescriptions in 2024
| Prescriptions (claims) | 707 · 1,423 30-day fills |
|---|---|
| Patients | 296 |
| Total drug cost | $192,201 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | Northwestern University Feinberg Medical School |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Northwestern Medical Faculty FoundationChicago, IL · 4,503 clinicians
Hospital affiliations
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Northwestern Medicine Delnor Community HospitalGeneva, IL
- Northwestern Memorial HospitalChicago, IL
Industry payments (Open Payments)
- 2025$390.02 · 3 payments from 2 companies
- 2024$240.95 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $287.75 | 2 |
| Abbvie Inc. | $102.27 | 1 |
What the 2025 payments were for
- Food and Beverage$390.02 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 29 gastroenterologists in Aurora · All gastroenterologists in Illinois