Psychologist | Clinical Child & Adolescent Psychology

Dr. Randall Lee Ahn, PHD, MLIS

16465 Sierra Lakes Pkwy Ste 140, Fontana, California, 92336-1242

About Dr. Randall Lee Ahn

Dr. Randall Lee Ahn is a psychologist based in Fontana, California who is specialized in Clinical Child & Adolescent Psychology. Active license number of Dr. Randall Lee Ahn is PSY13956 for Clinical Child & Adolescent Psychology in California. His current practice location is 16465 Sierra Lakes Pkwy Ste 140, Fontana. Patients can contact him at 909-244-9593 or can fax him at 833-903-0337. Dr. Randall Lee Ahn, PHD, MLIS, specializes in Clinical Child & Adolescent Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1093939399.

Dr. Randall Lee Ahn analyse the cognitive, social and emotional development of children. Typically, he look at development from the prenatal period through adolescence. Some of the traditional areas of interest include genetics, language development, learning disabilities, personality, gender roles, cognitive development, sexual development and social growth.
Clinical Child Psychologist responsibilities includes task like assessing and treating learning or developmental disabilities or delays; Working with children and their caregivers to manage behavioral issues; Administering psychological tests; Conducting scientific research on childhood development; Working with a health care team to create a unique treatment plan for a client.

Practice Information

Dr. Randall Lee Ahn'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. Randall Lee Ahn
Specialization Clinical Child & Adolescent Psychology
Credentials PHD, MLIS
Gender Male
Practice Address: 16465 Sierra Lakes Pkwy Ste 140,
Fontana, CA - 92336-1242
Fax 833-903-0337

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 Number1093939399
NPI Enumeration Date: 11 Apr, 2007
NPI Last Update On: 07 May, 2024

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. Randall Lee Ahn are as mentioned below.

License NumberSpecializationStateStatus
PSY13956Clinical Child & Adolescent Psychology CaliforniaPrimary

Other Medical Identifiers

Other professional identifiers associated with Dr. Randall Lee Ahn such as Medicaid, Medicare PIN, NSC, UPIN etc. are mentioned as below.
IdentifierTypeStateIssuer
PSY13956OtherCaliforniaPSYCHOLOGY LICENSE

Mailing Address

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

Dr. Randall Lee Ahn
241 E 17th St # 1029,
Costa Mesa, CA - 92627-3831
Phone: 949-414-7149

Book an Appointment with Dr. Randall Lee Ahn

To schedule an appointment, contact Dr. Randall Lee Ahn at 16465 Sierra Lakes Pkwy Ste 140, Fontana, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Randall Lee Ahn:

Dr. Randall Lee Ahn is a psychologist specializing in Clinical Child & Adolescent Psychology. He analyse the cognitive, social and emotional development of children. Typically, he look at development from the prenatal period through adolescence. Some of the traditional areas of interest include genetics, language development, learning disabilities, personality, gender roles, cognitive development, sexual development and social growth.
Clinical Child Psychologist responsibilities includes task like assessing and treating learning or developmental disabilities or delays; Working with children and their caregivers to manage behavioral issues; Administering psychological tests; Conducting scientific research on childhood development; Working with a health care team to create a unique treatment plan for a client.

Yes, Dr. Randall Lee Ahn 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. Randall Lee Ahn practices at 16465 Sierra Lakes Pkwy Ste 140, Fontana, California, 92336-1242.

To schedule an appointment with Dr. Randall Lee Ahn, please contact the office at 909-244-9593.

Reviews & Feedback

Have you visited Dr. Randall Lee Ahn? Share your experience to help others looking for a psychologist in Fontana, CA.

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