Psychologist | Clinical Psychology

Lester Summerfield, PH.D.

4045 E Thousand Oaks Blvd Ste 220, Westlake Village, California, 91362-6977

About Lester Summerfield

Lester Summerfield is a psychologist based in Westlake Village, California who is specialized in Clinical Psychology. Active license number of Lester Summerfield is CA PSY 6055 for Clinical Psychology in California. His current practice location is 4045 E Thousand Oaks Blvd Ste 220, Westlake Village. Patients can contact him at 805-496-6992 or can fax him at 805-496-4787. Lester Summerfield, PH.D., specializes in Clinical Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1538611017.

Lester Summerfield 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

Lester Summerfield'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 Lester Summerfield
Specialization Clinical Psychology
Credentials PH.D.
Gender Male
Practice Address: 4045 E Thousand Oaks Blvd Ste 220,
Westlake Village, CA - 91362-6977
Fax 805-496-4787

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 Number1538611017
NPI Enumeration Date: 31 Oct, 2016
NPI Last Update On: 09 Apr, 2025

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 Lester Summerfield are as mentioned below.

License NumberSpecializationStateStatus
CA PSY 6055Clinical 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.

Lester Summerfield
347 Venus St,
Thousand Oaks, CA - 91360-2960
Phone: 805-496-6992

Book an Appointment with Lester Summerfield

To schedule an appointment, contact Lester Summerfield at 4045 E Thousand Oaks Blvd Ste 220, Westlake Village, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Lester Summerfield:

Lester Summerfield 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, Lester Summerfield 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.

Lester Summerfield practices at 4045 E Thousand Oaks Blvd Ste 220, Westlake Village, California, 91362-6977.

To schedule an appointment with Lester Summerfield, please contact the office at 805-496-6992.

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