Vairavan Viswanathan, M.D.
NPI 1326083890ActiveIndividual· Internal Medicine· Joliet, IL
Internal Medicine (M.D.) with Dupage Medical Group Ltd, practicing in Joliet, Illinois. Their prescriptions cost Medicare Part D more than their services did: $609,611 for 11,252 claims, against $300,396 paid for services in 2024. Lilly USA, LLC was the largest of 5 companies reporting payments in 2025, $250.81 in all, mostly food and beverage. Lists Saint Joseph Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1326083890 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 18, 2006 |
| Last updated in NPPES | Aug 28, 2023 |
| Certified by provider | Aug 28, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 36-087483 | 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 - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 660 |
|---|---|
| Services billed | 8,877 across 85 procedure codes |
| Paid by Medicare | $300,396 |
Part D prescriptions in 2024
| Prescriptions (claims) | 11,252 · 30,159 30-day fills |
|---|---|
| Patients | 913 |
| Total drug cost | $609,611 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 1988 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Dupage Medical Group LtdWinfield, IL · 1,322 clinicians
Hospital affiliations
- Saint Joseph Medical CenterJoliet, IL
- Silver Cross Hospital and Medical CentersNew Lenox, IL
Other facilities
- Family Home Health Services, IncHome health agency · Addison, IL
- Newsome Home Health Care & Purpose Care of Illinois - JolietHome health agency · Joliet, IL
- Silver Cross Home HealthHome health agency · New Lenox, IL
- Lightways Hospice and Serious Illness CareHospice · Joliet, IL
Industry payments (Open Payments)
- 2025$250.81 · 10 payments from 5 companies
- 2024$503.12 · 12 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $119.63 | 3 |
| Abbvie Inc. | $72.22 | 4 |
| Novo Nordisk Inc | $24.69 | 1 |
| Alk-Abello, Inc | $20.40 | 1 |
| Amgen Inc. | $13.87 | 1 |
What the 2025 payments were for
- Food and Beverage$250.81 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 61 internal medicine physicians in Joliet · All internal medicine physicians in Illinois