Karen Hammerman, MD
NPI 1083934087 · Dermatology Physician · Brooklyn, NY
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Hammerman, MD is a Dermatology Physician provider in Brooklyn, NY (NPI 1083934087).
Provider details
- NPI number
- 1083934087
- Entity type
- Individual
- Primary specialty
- Dermatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 263285 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
16 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,638 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 832 | $8 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 796 | $103 |
| Biopsy of Related Skin Growth, First Growth11102 | 281 | $101 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 236 | $57 |
| Destruction of Skin Growth, 1-14 Growths17110 | 194 | $129 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Mupirocin | 148 | 110 |
| Ketoconazole | 100 | 44 |
| Triamcinolone Acetonide | 82 | 69 |
| Fluocinonide | 61 | 43 |
| Metronidazole | 36 | 18 |
| Nystatin | 29 | 15 |
| Hydrocortisone | 26 | 23 |
| Valacyclovir Hclbrand: Valacyclovir | 23 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,244 across 59 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-06-02
- Last updated
- 2015-03-04
Frequently asked questions
- What is Karen Hammerman's NPI number?
- Karen Hammerman's National Provider Identifier (NPI) is 1083934087, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Hammerman's specialty?
- Karen Hammerman is listed in the NPPES registry with a primary specialty of Dermatology Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Hammerman located?
- Karen Hammerman's practice location on file with NPPES is 2408 Ocean Ave, Brooklyn, NY 11229-3565.
- What is Karen Hammerman's phone number?
- The practice phone number listed in the NPPES registry for Karen Hammerman is (718) 332-2999.
- Does Karen Hammerman accept Medicare?
- Karen Hammerman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Hammerman's NPI active?
- Yes — Karen Hammerman's NPI (1083934087) is active in the NPPES registry as of the last update on 2015-03-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.