Psychologist | General Psychology

Dr. John T Duffin, PHD

129 Hospital Dr, Watertown, Wisconsin, 53098-3384

About Dr. John T Duffin

Dr. John T Duffin is a psychologist based in Watertown, Wisconsin who is specialized in General Psychology. Active license number of Dr. John T Duffin is 871057 for General Psychology in Wisconsin. His current practice location is 129 Hospital Dr, Watertown. Patients can contact him at 920-262-4800 or can fax him at 920-262-4813. Dr. John T Duffin, PHD, specializes in General Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1932184868.

Dr. John T Duffin 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

Dr. John T Duffin'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 Dr. John T Duffin
Specialization General Psychology
Credentials PHD
Gender Male
Practice Address: 129 Hospital Dr,
Watertown, WI - 53098-3384
Fax 920-262-4813

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 Number1932184868
NPI Enumeration Date: 14 Dec, 2005
NPI Last Update On: 13 Jul, 2026

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 Dr. John T Duffin are as mentioned below.

License NumberSpecializationStateStatus
871057General Psychology WisconsinPrimary

Other Medical Identifiers

Other professional identifiers associated with Dr. John T Duffin such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
IdentifierTypeStateIssuer
3909110MedicaidWisconsin

Mailing Address

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

Dr. John T Duffin
129 Hospital Dr,
Watertown, WI - 53098-3384
Phone: 920-262-4800
Fax: 920-262-4813

Book an Appointment with Dr. John T Duffin

To schedule an appointment, contact Dr. John T Duffin at 129 Hospital Dr, Watertown, Wisconsin or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. John T Duffin:

Dr. John T Duffin 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, Dr. John T Duffin 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.

Dr. John T Duffin practices at 129 Hospital Dr, Watertown, Wisconsin, 53098-3384.

To schedule an appointment with Dr. John T Duffin, please contact the office at 920-262-4800.

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