Psychologist | General Psychology

John Thomassen, PHD

103 White Spruce Blvd, Rochester, New York, 14623-1610

About John Thomassen

John Thomassen is a psychologist based in Rochester, New York who is specialized in General Psychology. Active license number of John Thomassen is 009938-1 for General Psychology in New York. His current practice location is 103 White Spruce Blvd, Rochester. Patients can contact him at 585-292-5830. John Thomassen, PHD, specializes in General Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1881747020.

John Thomassen is specialized in psychological testing and evaluating or assessing patient's personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning. Accordingly, he performs counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy. He can diagnose and treat mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability by psycheducational evaluation, therapy, remediation, and consultation.

Practice Information

John Thomassen'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 John Thomassen
Specialization General Psychology
Credentials PHD
Gender Male
Practice Address: 103 White Spruce Blvd,
Rochester, NY - 14623-1610

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 Number1881747020
NPI Enumeration Date: 19 Jan, 2007
NPI Last Update On: 09 Jul, 2007

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 John Thomassen are as mentioned below.

License NumberSpecializationStateStatus
009938-1General Psychology New YorkPrimary

Other Medical Identifiers

Other professional identifiers associated with John Thomassen such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
IdentifierTypeStateIssuer
027548OtherVALUE OPTIONS
7283460OtherNew YorkAENTA
156779FCOtherNew YorkPREFERRED CARE

Mailing Address

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

John Thomassen
831 W Bloomfield Rd,
Honeoye Falls, NY - 14472-9326

Book an Appointment with John Thomassen

To schedule an appointment, contact John Thomassen at 103 White Spruce Blvd, Rochester, New York or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about John Thomassen:

John Thomassen is a psychologist specializing in General Psychology. He is specialized in psychological testing and evaluating or assessing patient's personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning. Accordingly, he performs counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy. He can diagnose and treat mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability by psycheducational evaluation, therapy, remediation, and consultation.

Yes, John Thomassen 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.

John Thomassen practices at 103 White Spruce Blvd, Rochester, New York, 14623-1610.

To schedule an appointment with John Thomassen, please contact the office at 585-292-5830.

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