Psychiatrist

John Joseph Clark, MD

2120 L St Nw Ste 600, Washington, District Of Columbia, 20037-1540

About John Joseph Clark

John Joseph Clark is a psychiatrist based in Washington, District Of Columbia who is specialized in Psychiatry. Active license number of John Joseph Clark is MD600004346 for Psychiatry in District Of Columbia. His current practice location is 2120 L St Nw Ste 600, Washington. Patients can contact him at 202-741-2900. John Joseph Clark, MD, specializes in Psychiatry and his NPI number (Unique professional ID assigned by NPPES) is 1538859269.

John Joseph Clark specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

Practice Information

John Joseph Clark'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 John Joseph Clark
Specialization Psychiatry
Credentials MD
Gender Male
Practice Address: 2120 L St Nw Ste 600,
Washington, DC - 20037-1540

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 Number1538859269
NPI Enumeration Date: 08 May, 2023
NPI Last Update On: 01 Jul, 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 John Joseph Clark are as mentioned below.

License NumberSpecializationStateStatus
MD600004346Psychiatry 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.

John Joseph Clark
2120 L St Nw Ste 600,
Washington, DC - 20037-1540
Phone: 202-741-2900

Book an Appointment with John Joseph Clark

To schedule an appointment, contact John Joseph Clark at 2120 L St Nw Ste 600, Washington, District Of Columbia or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about John Joseph Clark:

John Joseph Clark is a psychiatrist specializing in Psychiatry. He specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

Yes, John Joseph Clark 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.

John Joseph Clark practices at 2120 L St Nw Ste 600, Washington, District Of Columbia, 20037-1540.

To schedule an appointment with John Joseph Clark, please contact the office at 202-741-2900.

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