Psychologist | Cognitive & Behavioral Psychology

Leslie Gellis, PH.D

804 University Ave, 201, Syracuse, New York, 13210-1721

About Leslie Gellis

Leslie Gellis is a psychologist based in Syracuse, New York who is specialized in Cognitive & Behavioral Psychology. Active license number of Leslie Gellis is 018822-1 for Cognitive & Behavioral Psychology in New York. His current practice location is 804 University Ave, 201, Syracuse. Patients can contact him at 315-443-3595. Leslie Gellis, PH.D, specializes in Cognitive & Behavioral Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1336552959.

Leslie Gellis has variety of professional responsibilities, including assessment (identifying, diagnosing, and conceptualizing problems experienced by individuals or groups), intervention (creating, implementing and evaluating interventions designed to induce positive change) and consultation. Cognitive Behavioral Psychologists also participates in research, education, training, and clinical practice including a range of issues and populations.

Practice Information

Leslie Gellis's specialty, credentials, practice address, contact phone number and fax are as below. Patients can call on the below given phone number for appointment.

Provider Name Leslie Gellis
Specialization Cognitive & Behavioral Psychology
Credentials PH.D
Gender Male
Practice Address: 804 University Ave, 201
Syracuse, NY - 13210-1721

Professional Identification Codes

NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to healthcare providers in the United States by the Centers for Medicare and Medicaid Services (CMS). NPI details are as mentioned below.

NPI Number1336552959
NPI Enumeration Date: 11 Jun, 2014
NPI Last Update On: 11 Jun, 2014

Medical Licenses:

Healthcare professionals can hold one or more medical licenses for different specialties in the same state or different states. Related medical licenses for Leslie Gellis are as mentioned below.

License NumberSpecializationStateStatus
018822-1Cognitive & Behavioral Psychology New YorkPrimary

Mailing Address

Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned Practice address.

Leslie Gellis
804 University Ave, 201
Syracuse, NY - 13210-1721
Phone: 315-443-3595

Book an Appointment with Leslie Gellis

To schedule an appointment, contact Leslie Gellis at 804 University Ave, 201, Syracuse, New York or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Leslie Gellis:

Leslie Gellis is a psychologist specializing in Cognitive & Behavioral Psychology. He has variety of professional responsibilities, including assessment (identifying, diagnosing, and conceptualizing problems experienced by individuals or groups), intervention (creating, implementing and evaluating interventions designed to induce positive change) and consultation. Cognitive Behavioral Psychologists also participates in research, education, training, and clinical practice including a range of issues and populations.

Yes, Leslie Gellis is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.
*Availability may change. Please contact the office directly to ask about appointments.

Leslie Gellis practices at 804 University Ave, 201, Syracuse, New York, 13210-1721.

To schedule an appointment with Leslie Gellis, please contact the office at 315-443-3595.

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**Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 14 September, 2026.