Psychologist | Clinical Psychology

John Trojanowski, PSYD

1400 Shattuck Ave Ste 12-216, Berkeley, California, 94709-1411

About John Trojanowski

John Trojanowski is a psychologist based in Berkeley, California who is specialized in Clinical Psychology. Active license number of John Trojanowski is PSY31863 for Clinical Psychology in California. His current practice location is 1400 Shattuck Ave Ste 12-216, Berkeley. Patients can contact him at 510-239-7024. John Trojanowski, PSYD, specializes in Clinical Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1073804910.

John Trojanowski is a mental health professional with highly specialized training in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). His main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that he can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Practice Information

John Trojanowski'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 Trojanowski
Specialization Clinical Psychology
Credentials PSYD
Gender Male
Practice Address: 1400 Shattuck Ave Ste 12-216,
Berkeley, CA - 94709-1411

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 Number1073804910
NPI Enumeration Date: 26 Apr, 2011
NPI Last Update On: 20 Feb, 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 John Trojanowski are as mentioned below.

License NumberSpecializationStateStatus
PSY31863Clinical Psychology CaliforniaPrimary

Mailing Address

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

John Trojanowski
1400 Shattuck Ave Ste 12-216,
Berkeley, CA - 94709-1411
Phone: 510-239-7024

Book an Appointment with John Trojanowski

To schedule an appointment, contact John Trojanowski at 1400 Shattuck Ave Ste 12-216, Berkeley, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about John Trojanowski:

John Trojanowski is a psychologist specializing in Clinical Psychology. He is a mental health professional with highly specialized training in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). His main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that he can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Yes, John Trojanowski 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 Trojanowski practices at 1400 Shattuck Ave Ste 12-216, Berkeley, California, 94709-1411.

To schedule an appointment with John Trojanowski, please contact the office at 510-239-7024.

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