William Hennessey, MD PC
NPI 1952325649 · Gynecology Physician · Green Island, NY
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Hennessey, MD PC is a Gynecology Physician provider in Green Island, NY (NPI 1952325649).
Provider details
- NPI number
- 1952325649
- Entity type
- Individual
- Primary specialty
- Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD PC
- Sex
- Male
- Sole proprietor
- Yes
- License
- 120355 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-26
- Last updated
- 2008-03-04
Frequently asked questions
- What is William Hennessey's NPI number?
- William Hennessey's National Provider Identifier (NPI) is 1952325649, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Hennessey's specialty?
- William Hennessey is listed in the NPPES registry with a primary specialty of Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is William Hennessey located?
- William Hennessey's practice location on file with NPPES is 31 Lower Hudson Ave, Green Island, NY 12183-1014.
- What is William Hennessey's phone number?
- The practice phone number listed in the NPPES registry for William Hennessey is (518) 272-9140.
- Does William Hennessey accept Medicare?
- William Hennessey is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Hennessey's NPI active?
- Yes — William Hennessey's NPI (1952325649) is active in the NPPES registry as of the last update on 2008-03-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.