Karen Laura Hammerman, MD
NPI 1083934087ActiveIndividual· Dermatology· Brooklyn, NY
Dermatology (MD) in Brooklyn, New York, trained at State University of New York Downstate Medical Center (class of 2007). 538 Medicare patients in 2024, $147,670 paid; nearly all of their 760 Part D prescriptions were generic (93%). Incyte Corporation was the largest of 17 companies reporting payments in 2025, $1,317 in all, mostly food and beverage.
Overview
| NPI | 1083934087 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 2, 2010 |
| Last updated in NPPES | Mar 4, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | 263285 | NY |
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 (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 538 |
|---|---|
| Services billed | 2,720 across 23 procedure codes |
| Paid by Medicare | $147,670 |
Part D prescriptions in 2024
| Prescriptions (claims) | 760 · 804 30-day fills |
|---|---|
| Patients | 290 |
| Total drug cost | $158,710 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | State University of New York Downstate Medical Center |
|---|---|
| Graduation year | 2007 |
| Medicare specialty | Dermatology |
Medical group
- Schweiger Dermatology PLLCNew York, NY · 260 clinicians
Industry payments (Open Payments)
- 2025$1,317 · 60 payments from 17 companies
- 2024$1,244 · 59 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Incyte Corporation | $200.02 | 8 |
| Regeneron Healthcare Solutions, Inc. | $163.57 | 5 |
| Janssen Biotech, Inc. | $163.36 | 9 |
| Abbvie Inc. | $154.97 | 8 |
| Galderma Laboratories, L.P. | $96.29 | 5 |
What the 2025 payments were for
- Food and Beverage$1,317 · 60 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 121 dermatologists in Brooklyn · All dermatologists in New York