About Denis P. Callahan, LGSW, MSW
Denis Patrick Callahan, LGSW, MSW is a clinical social worker. Mr. Denis P. Callahan has 15 years of experience in clinical social work.
Education
Denis P. Callahan, LGSW, MSW earned degrees of a Licensed Graduate Social Worker and Medical Social Worker.
Licenses
Denis P. Callahan, LGSW, MSW has been registered with the National Provider Identifier database since December 12, 2008, and his NPI number is 1134364672. Mr. Callahan certified his NPI information on 02/13/2022.
Book an Appointment
To schedule an appointment with Mr. Denis P. Callahan, please call (202) 903-6876.