Psychologist | Clinical Psychology

Dr. Leo Matthew Duggan Iii, PH.D.

4137 E 7th St, Long Beach, California, 90804-5311

About Dr. Leo Matthew Duggan Iii

Dr. Leo Matthew Duggan Iii is a psychologist based in Long Beach, California who is specialized in Clinical Psychology. Active license number of Dr. Leo Matthew Duggan Iii is PSY11407 for Clinical Psychology in California. His current practice location is 4137 E 7th St, Long Beach. Patients can contact him at 562-433-7652 or can fax him at 562-433-8152. Dr. Leo Matthew Duggan Iii, PH.D., specializes in Clinical Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1134250194.

Dr. Leo Matthew Duggan Iii 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

Dr. Leo Matthew Duggan Iii'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. Leo Matthew Duggan Iii
Specialization Clinical Psychology
Credentials PH.D.
Gender Male
Practice Address: 4137 E 7th St,
Long Beach, CA - 90804-5311
Fax 562-433-8152

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 Number1134250194
NPI Enumeration Date: 08 Mar, 2007
NPI Last Update On: 08 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 Dr. Leo Matthew Duggan Iii are as mentioned below.

License NumberSpecializationStateStatus
PSY11407Clinical 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.

Dr. Leo Matthew Duggan Iii
4137 E 7th St,
Long Beach, CA - 90804-5311
Phone: 562-433-7652
Fax: 562-433-8152

Book an Appointment with Dr. Leo Matthew Duggan Iii

To schedule an appointment, contact Dr. Leo Matthew Duggan Iii at 4137 E 7th St, Long Beach, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Leo Matthew Duggan Iii:

Dr. Leo Matthew Duggan Iii 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, Dr. Leo Matthew Duggan Iii 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. Leo Matthew Duggan Iii practices at 4137 E 7th St, Long Beach, California, 90804-5311.

To schedule an appointment with Dr. Leo Matthew Duggan Iii, please contact the office at 562-433-7652.

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