Charles S. Katzman
NPI 1083242853ActiveIndividual· Dermatology· Chicago, IL
Dermatology in Chicago, Illinois, trained at University of Michigan Medical School (class of 2020). Their prescriptions cost Medicare Part D more than their services did: $701,361 for 521 claims, against $13,693 paid for services in 2024. Regeneron Healthcare Solutions, Inc. was the largest of 7 companies reporting payments in 2025, $1,021 in all, mostly food and beverage.
Overview
| NPI | 1083242853 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | Yes |
| NPI issued | Mar 29, 2020 |
| Last updated in NPPES | Oct 30, 2024 |
| Certified by provider | Oct 9, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | 036170543 | IL |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - Dermatology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 100 |
|---|---|
| Services billed | 236 across 23 procedure codes |
| Paid by Medicare | $13,693 |
Part D prescriptions in 2024
| Prescriptions (claims) | 521 · 577 30-day fills |
|---|---|
| Patients | 148 |
| Total drug cost | $701,361 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | University of Michigan Medical School |
|---|---|
| Graduation year | 2020 |
| Medicare specialty | Dermatology |
| Telehealth | Offers telehealth |
Medical group
- Northwestern Medical Faculty FoundationChicago, IL · 4,503 clinicians
Hospital affiliation
- Northwestern Memorial HospitalChicago, IL
Industry payments (Open Payments)
- 2025$1,021 · 26 payments from 7 companies
- 2024$340.87 · 4 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Regeneron Healthcare Solutions, Inc. | $256.19 | 3 |
| Galderma Laboratories, L.P. | $250.42 | 10 |
| Abbvie Inc. | $178.47 | 8 |
| Janssen Biotech, Inc. | $142.20 | 2 |
| Leo Pharma Inc. | $137.06 | 1 |
What the 2025 payments were for
- Food and Beverage$920.92 · 25 payments
- Education$99.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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