Warren Louis Kammerer, MD
NPI 1134236565ActiveIndividual· Psychiatry & Neurology, Psychiatry· Park Ridge, IL
Psychiatry & Neurology, Psychiatry (MD) in Park Ridge, Illinois, trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) (class of 1987). Their prescriptions cost Medicare Part D more than their services did: $55,086 for 1,134 claims, against $22,779 paid for services in 2024. Bausch Health US, LLC was the largest of 7 companies reporting payments in 2025, $277.64 in all, mostly food and beverage.
Overview
| NPI | 1134236565 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Aug 23, 2006 |
| Last updated in NPPES | Mar 26, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | 036077883 | 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 - Psychiatry (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 73 |
|---|---|
| Services billed | 378 across 4 procedure codes |
| Paid by Medicare | $22,779 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,134 · 1,776 30-day fills |
|---|---|
| Patients | 98 |
| Total drug cost | $55,086 |
| Generic share | 96% of claims |
Education and affiliations
| Medical school | University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) |
|---|---|
| Graduation year | 1987 |
| Medicare specialty | Psychiatry |
Industry payments (Open Payments)
- 2025$277.64 · 14 payments from 7 companies
- 2024$439.67 · 22 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bausch Health US, LLC | $78.92 | 4 |
| Abbvie Inc. | $66.14 | 3 |
| Otsuka America Pharmaceutical, Inc. | $44.74 | 2 |
| Lundbeck LLC | $36.85 | 2 |
| Janssen Pharmaceuticals, Inc | $19.32 | 1 |
What the 2025 payments were for
- Food and Beverage$277.64 · 14 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 57 psychiatrists in Park Ridge · All psychiatrists in Illinois