Walter Liszewski, MD
NPI 1033505243ActiveIndividual· Dermatology· Chicago, IL
Dermatology (MD) in Chicago, Illinois, trained at Tulane University School of Medicine (class of 2015). Their prescriptions cost Medicare Part D more than their services did: $983,833 for 933 claims, against $99,488 paid for services in 2024. Lilly USA, LLC was the largest of 14 companies reporting payments in 2025, $303,912 in all, mostly speaking and faculty fees.
Overview
| NPI | 1033505243 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 14, 2015 |
| Last updated in NPPES | Jul 29, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | 036.149833 | IL |
| Dermatology | 207N00000X | 62406 | MN |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Dermatology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 449 |
|---|---|
| Services billed | 5,681 across 42 procedure codes |
| Paid by Medicare | $99,488 |
Part D prescriptions in 2024
| Prescriptions (claims) | 933 · 1,192 30-day fills |
|---|---|
| Patients | 342 |
| Total drug cost | $983,833 |
| Generic share | 82% of claims |
Education and affiliations
| Medical school | Tulane University School of Medicine |
|---|---|
| Graduation year | 2015 |
| Medicare specialty | Dermatology |
| Telehealth | Offers telehealth |
Medical group
- Northwestern Medical Faculty FoundationChicago, IL · 4,503 clinicians
Hospital affiliations
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Northwestern Memorial HospitalChicago, IL
Industry payments (Open Payments)
- 2025$303,912 · 234 payments from 14 companies
- 2024$85,532 · 119 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $100,391 | 75 |
| Genzyme Corporation | $84,968 | 35 |
| Galderma Laboratories, L.P. | $54,017 | 46 |
| Abbvie Inc. | $16,511 | 24 |
| Leo Pharma Inc. | $13,507 | 19 |
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$218,470 · 58 payments
- Consulting Fee$60,451 · 18 payments
- Travel and Lodging$18,899 · 55 payments
- Food and Beverage$6,092 · 103 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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