Psychology Clinic | Clinical Psychology

Mellow Psychological Services, Inc.

200 Pier Ave, Suite 424, Hermosa Beach, California, 90254-3608

About Mellow Psychological Services, Inc.

Mellow Psychological Services, Inc. is a psychology clinic located in Hermosa Beach, California. specializing in Clinical Psychology. The clinic is located at 200 Pier Ave, Suite 424, Hermosa Beach, CA and can be reached at 800-593-2560. The authorized official for Mellow Psychological Services, Inc. is Dr. Colleen F. Long, who serves the clinic’s Owner. He/She can be contacted at 800-593-2560. The clinic’s primary license number in California is PSY23911 (Clinical) .
Mellow Psychological Services, Inc. Clinic has mental health professionals specialized in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). Psychologists main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that psychologists can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Clinic Information

Mellow Psychological Services, Inc. Clinic's specialty, address, contact phone number and fax are as below. Patients can contact the clinic at the given phone number for appointments.

Clinic Name Mellow Psychological Services, Inc.
Specialization Clinical Psychology
Practice Address 200 Pier Ave, Suite 424
Hermosa Beach, CA - 90254-3608
Fax 800-593-2560

Authorized/Official Person Profile

Officially authorized person to contact for any management issues or complaints for this clinic are as below. Person's position and contact details are also mentioned below.

Name Dr. Colleen F. Long
Position Owner
Contact Number 800-593-2560

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 Number1457608804
NPI Enumeration Date: 04 Aug, 2012
NPI Last Update On: 04 Aug, 2012

Medical Licenses

Organizations can have one or more medical licenses for different specialities in the same state or different states. Related medical licenses for Mellow Psychological Services, Inc. are as mentioned below.
License NumberSpecializationStateStatus
PSY23911Clinical CaliforniaPrimary

Mailing Address

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

Mellow Psychological Services, Inc.
200 Pier Ave, Suite 424
Hermosa Beach, CA - 90254-3608
Phone: 800-593-2560
Fax: 800-593-2560

Book an Appointment with Mellow Psychological Services, Inc.

To schedule an appointment, contact Mellow Psychological Services, Inc. at 200 Pier Ave, Suite 424, Hermosa Beach, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Mellow Psychological Services, Inc. clinic:

Mellow Psychological Services, Inc. is a psychology clinic specializing in Clinical Psychology.

Mellow Psychological Services, Inc. is located at 200 Pier Ave, Suite 424, Hermosa Beach, California 90254-3608.

Patients can contact Mellow Psychological Services, Inc. at 800-593-2560 for inquiries about its services and appointments.

Please contact Mellow Psychological Services, Inc. directly to inquire about new-patient availability and appointment options.
* Availability may change.

Mellow Psychological Services, Inc. has mental health professionals specialized in the diagnosis and psychological treatment of mental, behavioral and emotional illnesses, including obsessive-compulsive disorder (OCD). Psychologists main focus is on diagnosing and treating mental, emotional, and behavioral disorders. Some of the common disorders that psychologists can treat are learning disabilities, substance abuse, depression, anxiety, and eating disorders.

Patients can contact Mellow Psychological Services, Inc. at 800-593-2560 to inquire about appointments, consultation requirements and available services.

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