Leslie Gellis, PH.D
NPI 1336552959 · Cognitive & Behavioral Psychologist · Syracuse, NY
Leslie Gellis, PH.D is a Cognitive & Behavioral Psychologist provider in Syracuse, NY (NPI 1336552959).
Provider details
- NPI number
- 1336552959
- Entity type
- Individual
- Primary specialty
- Cognitive & Behavioral PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D
- Sex
- Male
- Sole proprietor
- No
- License
- 018822-1 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
12 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
- 2014-06-11
- Last updated
- 2014-06-11
Frequently asked questions
- What is Leslie Gellis's NPI number?
- Leslie Gellis's National Provider Identifier (NPI) is 1336552959, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leslie Gellis's specialty?
- Leslie Gellis is listed in the NPPES registry with a primary specialty of Cognitive & Behavioral Psychologist (Behavioral Health & Social Service Providers).
- Where is Leslie Gellis located?
- Leslie Gellis's practice location on file with NPPES is 804 University Ave, Syracuse, NY 13210-1721.
- What is Leslie Gellis's phone number?
- The practice phone number listed in the NPPES registry for Leslie Gellis is (315) 443-3595.
- Is Leslie Gellis's NPI active?
- Yes — Leslie Gellis's NPI (1336552959) 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.