Psychologist | Clinical Psychology

Mark Douglas Diamond, PHD

29377 Rancho California Rd, Suite 201, Temecula, California, 92591-5206

About Mark Douglas Diamond

Mark Douglas Diamond is a psychologist based in Temecula, California who is specialized in Clinical Psychology. Active license number of Mark Douglas Diamond is PSY8771 for Clinical Psychology in California. His current practice location is 29377 Rancho California Rd, Suite 201, Temecula. Patients can contact him at 951-693-2486. Mark Douglas Diamond, PHD, specializes in Clinical Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1831247998.

Mark Douglas Diamond 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

Mark Douglas Diamond'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 Mark Douglas Diamond
Specialization Clinical Psychology
Credentials PHD
Gender Male
Practice Address: 29377 Rancho California Rd, Suite 201
Temecula, CA - 92591-5206

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 Number1831247998
NPI Enumeration Date: 08 Jan, 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 Mark Douglas Diamond are as mentioned below.

License NumberSpecializationStateStatus
PSY8771Clinical Psychology CaliforniaPrimary

Other Medical Identifiers

Other professional identifiers associated with Mark Douglas Diamond such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
IdentifierTypeStateIssuer
PJ0087710OtherCaliforniaMEDICAL

Mailing Address

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

Mark Douglas Diamond
24980 Terreno Dr,
Temecula, CA - 92590-3989
Phone: 951-693-2486

Book an Appointment with Mark Douglas Diamond

To schedule an appointment, contact Mark Douglas Diamond at 29377 Rancho California Rd, Suite 201, Temecula, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Mark Douglas Diamond:

Mark Douglas Diamond 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, Mark Douglas Diamond 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.

Mark Douglas Diamond practices at 29377 Rancho California Rd, Suite 201, Temecula, California, 92591-5206.

To schedule an appointment with Mark Douglas Diamond, please contact the office at 951-693-2486.

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