Psychologist | Clinical Psychology

Dr. John P Dennis, PH.D.

1729 21st St Nw, Washington, District Of Columbia, 20009-1101

About Dr. John P Dennis

Dr. John P Dennis is a psychologist based in Washington, District Of Columbia who is specialized in Clinical Psychology. Active license number of Dr. John P Dennis is PSY1000747 for Clinical Psychology in District Of Columbia. His current practice location is 1729 21st St Nw, Washington. Patients can contact him at 215-806-6442. Dr. John P Dennis, PH.D., specializes in Clinical Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1033400247.

Dr. John P Dennis 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. John P Dennis'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. John P Dennis
Specialization Clinical Psychology
Credentials PH.D.
Gender Male
Practice Address: 1729 21st St Nw,
Washington, DC - 20009-1101

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 Number1033400247
NPI Enumeration Date: 21 Apr, 2011
NPI Last Update On: 12 Mar, 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. John P Dennis are as mentioned below.

License NumberSpecializationStateStatus
PSY1000747Clinical Psychology District Of ColumbiaPrimary

Mailing Address

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

Dr. John P Dennis
14317 Shoreham Dr,
Silver Spring, MD - 20905-4481
Phone: 215-806-6442

Book an Appointment with Dr. John P Dennis

To schedule an appointment, contact Dr. John P Dennis at 1729 21st St Nw, Washington, District Of Columbia or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. John P Dennis:

Dr. John P Dennis is a psychologist specializing in Clinical Psychology. He 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.

Yes, Dr. John P Dennis 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. John P Dennis practices at 1729 21st St Nw, Washington, District Of Columbia, 20009-1101.

To schedule an appointment with Dr. John P Dennis, please contact the office at 215-806-6442.

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