Psychologist | Clinical Psychology

Dr. Marissa Long, MAOB, PSY.D.

250 W 1st St, 230, Claremont, California, 91711-4736

About Dr. Marissa Long

Dr. Marissa Long is a psychologist based in Claremont, California who is specialized in Clinical Psychology. Active license number of Dr. Marissa Long is PSB35507 for Clinical Psychology in California. Her current practice location is 250 W 1st St, 230, Claremont. Patients can contact her at 909-624-1997. Dr. Marissa Long, MAOB, PSY.D., specializes in Clinical Psychology and her NPI number (Unique professional ID assigned by NPPES) is 1396047056.

Dr. Marissa Long 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). Her main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that she can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Practice Information

Dr. Marissa Long'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. Marissa Long
Specialization Clinical Psychology
Credentials MAOB, PSY.D.
Gender Female
Practice Address: 250 W 1st St, 230
Claremont, CA - 91711-4736

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 Number1396047056
NPI Enumeration Date: 30 Nov, 2010
NPI Last Update On: 30 Nov, 2010

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. Marissa Long are as mentioned below.

License NumberSpecializationStateStatus
PSB35507Clinical 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. Marissa Long
250 W 1st St, 230
Claremont, CA - 91711-4736
Phone: 909-624-1997

Book an Appointment with Dr. Marissa Long

To schedule an appointment, contact Dr. Marissa Long at 250 W 1st St, 230, Claremont, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Marissa Long:

Dr. Marissa Long is a psychologist specializing in Clinical Psychology. She 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). Her main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that she can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Yes, Dr. Marissa Long 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. Marissa Long practices at 250 W 1st St, 230, Claremont, California, 91711-4736.

To schedule an appointment with Dr. Marissa Long, please contact the office at 909-624-1997.

Reviews & Feedback

Have you visited Dr. Marissa Long? Share your experience to help others looking for a psychologist in Claremont, CA.

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