Dennis Duffy, P.A.
NPI 1932136447 · Physician Assistant · Stony Brook, NY
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dennis Duffy, P.A. is a Physician Assistant provider in Stony Brook, NY (NPI 1932136447).
Provider details
- NPI number
- 1932136447
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- P.A.
- Sex
- Male
- Sole proprietor
- No
- License
- 004529 (NY)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
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
- 2006-06-28
- Last updated
- 2014-06-11
Frequently asked questions
- What is Dennis Duffy's NPI number?
- Dennis Duffy's National Provider Identifier (NPI) is 1932136447, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dennis Duffy's specialty?
- Dennis Duffy is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Dennis Duffy located?
- Dennis Duffy's practice location on file with NPPES is New York Spine and Brain Surgery, Stony Brook, NY 11794-8122.
- What is Dennis Duffy's phone number?
- The practice phone number listed in the NPPES registry for Dennis Duffy is (631) 444-1116.
- Does Dennis Duffy accept Medicare?
- Dennis Duffy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dennis Duffy's NPI active?
- Yes — Dennis Duffy's NPI (1932136447) is active in the NPPES registry as of the last update on 2014-06-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.