Jonathan Warren, MD
NPI 1871519124ActiveIndividual· Internal Medicine, Sleep Medicine· Joliet, IL
Internal Medicine, Sleep Medicine (MD) in Joliet, Illinois, trained at University of Chicago, Pritzker School of Medicine (class of 1981). 431 Medicare patients in 2024, $47,211 paid; nearly all of their 322 Part D prescriptions were generic (99%). Jazz Pharmaceuticals Inc. was the largest of 6 companies reporting payments in 2025, $634.94 in all, mostly food and beverage.
Overview
| NPI | 1871519124 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jul 13, 2006 |
| Last updated in NPPES | Mar 3, 2026 |
| Certified by provider | Mar 3, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Sleep Medicine Primary | 207RS0012X | 036104101 | IL |
| Internal Medicine | 207R00000X | 036-104101 | 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 | 431 |
|---|---|
| Services billed | 565 across 13 procedure codes |
| Paid by Medicare | $47,211 |
Part D prescriptions in 2024
| Prescriptions (claims) | 322 · 724 30-day fills |
|---|---|
| Patients | 63 |
| Total drug cost | $3,908 |
| Generic share | 99% of claims |
Education and affiliations
| Medical school | University of Chicago, Pritzker School of Medicine |
|---|---|
| Graduation year | 1981 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Hospital affiliations
- Northwest Community Hospital 1Arlington Heights, IL
- Saint Joseph Medical CenterJoliet, IL
Industry payments (Open Payments)
- 2025$634.94 · 15 payments from 6 companies
- 2024$248.06 · 10 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Jazz Pharmaceuticals Inc. | $329.63 | 6 |
| Axsome Therapeutics, Inc. | $132.43 | 4 |
| Inspire Medical Systems, Inc. | $100.17 | 2 |
| Avadel Cns Pharmaceuticals, LLC | $28.15 | 1 |
| Harmony Biosciences LLC | $24.29 | 1 |
What the 2025 payments were for
- Food and Beverage$484.94 · 14 payments
- Consulting Fee$150.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Sleep Medicine providers in Joliet
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