Psychologist | Clinical Psychology

Dr. Daniel Gilbert Cassidy, PHD, ABPP

8901 Rockville Pike, Bethesda, Maryland, 20889-5638

About Dr. Daniel Gilbert Cassidy

Dr. Daniel Gilbert Cassidy is a psychologist based in Bethesda, Maryland who is specialized in Clinical Psychology. Active license number of Dr. Daniel Gilbert Cassidy is B1-0000909 for Health Psychology in Delaware. His current practice location is 8901 Rockville Pike, Bethesda. Patients can contact him at 315-295-7117. Dr. Daniel Gilbert Cassidy, PHD, ABPP, specializes in Clinical Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1851533194.

Dr. Daniel Gilbert Cassidy 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

Dr. Daniel Gilbert Cassidy'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. Daniel Gilbert Cassidy
Specialization Clinical Psychology
Credentials PHD, ABPP
Gender Male
Practice Address: 8901 Rockville Pike,
Bethesda, MD - 20889-5638

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 Number1851533194
NPI Enumeration Date: 01 Apr, 2009
NPI Last Update On: 19 May, 2025

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. Daniel Gilbert Cassidy are as mentioned below.

License NumberSpecializationStateStatus
B1-0000909Health Psychology DelawarePrimary
B1-0000909Clinical Psychology DelawareSecondary

Mailing Address

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

Dr. Daniel Gilbert Cassidy
8901 Rockville Pike,
Bethesda, MD - 20889-0001

Book an Appointment with Dr. Daniel Gilbert Cassidy

To schedule an appointment, contact Dr. Daniel Gilbert Cassidy at 8901 Rockville Pike, Bethesda, Maryland or call the phone number listed below.

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Frequently Asked Questions

Below are some commonly asked questions about Dr. Daniel Gilbert Cassidy:

Dr. Daniel Gilbert Cassidy is a psychologist specializing in Health Psychology. He distinct focus is on physical health problems. A clinical health psychologist has special expertise or training in clinical health psychology and applies scientific knowledge of the interrelationships among behavioral, emotional, cognitive, social and biological components in health and disease to the promotion and maintenance of health; the prevention, treatment and rehabilitation of illness and disability and the improvement of the health care system. Clinical health psychologists are dedicated to the development of knowledge regarding the interface between behavior and health, and to the delivery of high quality services based on that knowledge to individuals, families, and health care.

Yes, Dr. Daniel Gilbert Cassidy 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. Daniel Gilbert Cassidy practices at 8901 Rockville Pike, Bethesda, Maryland, 20889-5638.

To schedule an appointment with Dr. Daniel Gilbert Cassidy, please contact the office at 315-295-7117.

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