N Hennessey, M.D.
NPI 1285694661 · Specialist · New York, NY
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
N Hennessey, M.D. is a Specialist provider in New York, NY (NPI 1285694661).
Provider details
- NPI number
- 1285694661
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 133471 (NY)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 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
3,503 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 787 | $101 |
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 562 | $7 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 501 | $142 |
| Destruction of Skin Growth, 1-14 Growths17110 | 459 | $121 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 433 | $54 |
| Biopsy of Related Skin Growth, First Growth |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Triamcinolone Acetonide | 151 | 90 |
| Ketoconazole | 75 | 36 |
| Ciclopirox Olaminebrand: Ciclopirox | 57 | 34 |
| Clobetasol Propionate | 55 | 30 |
| Valacyclovir Hclbrand: Valacyclovir | 52 | 23 |
| Imiquimod | 47 | 41 |
| Clindamycin Phosphate | 44 | 16 |
| Metronidazole |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$36 across 2 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
- 2006-03-28
- Last updated
- 2021-09-09
- Certified
- 2021-09-09
Frequently asked questions
- What is N Hennessey's NPI number?
- N Hennessey's National Provider Identifier (NPI) is 1285694661, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is N Hennessey's specialty?
- N Hennessey is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is N Hennessey located?
- N Hennessey's practice location on file with NPPES is 161 Madison Ave Rm 6se, New York, NY 10016-5454.
- What is N Hennessey's phone number?
- The practice phone number listed in the NPPES registry for N Hennessey is (212) 677-5555.
- Does N Hennessey accept Medicare?
- N Hennessey is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is N Hennessey's NPI active?
- Yes — N Hennessey's NPI (1285694661) is active in the NPPES registry as of the last update on 2021-09-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.