Psychologist | General Psychology

Dr. Diana Mah, PSY.D.

850 E Foothill Blvd, Rialto, California, 92376-5230

About Dr. Diana Mah

Dr. Diana Mah is a psychologist based in Rialto, California who is specialized in General Psychology. Her current practice location is 850 E Foothill Blvd, Rialto. Patients can contact her at 909-421-9380. Dr. Diana Mah, PSY.D., specializes in General Psychology and her NPI number (Unique professional ID assigned by NPPES) is 1023321734.

Dr. Diana Mah is specialized in psychological testing and evaluating or assessing patient's personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning. Accordingly, she performs counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy. She 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. Diana Mah'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. Diana Mah
Specialization General Psychology
Credentials PSY.D.
Gender Female
Practice Address: 850 E Foothill Blvd,
Rialto, CA - 92376-5230

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 Number1023321734
NPI Enumeration Date: 22 Jul, 2010
NPI Last Update On: 09 Jan, 2019

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. Diana Mah are as mentioned below.

License NumberSpecializationStateStatus
General Psychology Primary

Mailing Address

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

Dr. Diana Mah
303 E Vanderbilt Way,
San Bernardino, CA - 92415-0026
Phone: 909-421-9435

Book an Appointment with Dr. Diana Mah

To schedule an appointment, contact Dr. Diana Mah at 850 E Foothill Blvd, Rialto, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Diana Mah:

Dr. Diana Mah is a psychologist specializing in General Psychology. She is specialized in psychological testing and evaluating or assessing patient's personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning. Accordingly, she performs counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy. She 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. Diana Mah 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. Diana Mah practices at 850 E Foothill Blvd, Rialto, California, 92376-5230.

To schedule an appointment with Dr. Diana Mah, please contact the office at 909-421-9380.

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