Information The best way to obtain mental health services or information about these services is to call the Access HelpLine at 1 (888) 793-4357 (7WE-HELP), 24 hours a day, seven days a week. A mental health clinician is on duty at all times to evaluate an individual's need(s) and make the link between the individual and service provider. Individuals with hearing impairments can call our TDD line at (202) 673-7500 for services and information. The Access HelpLine's fax number is (202) 671-2972. The main telephone number for the Department of Mental Health is (202) 673-7440, weekdays between 8:15 am and 4:45 pm. Select from the following links for more information about the Department of Mental Health. Agency Calendar Important DMH Telephone Numbers: Use these numbers to reach specific sections of the Department of Mental Health. Hours of operation generally are weekdays between 8:15 am and 4:45 pm unless otherwise noted. Mental Health Rehabilitation Services: Obtain descriptions of community-based mental health services provided by the DMH Community Services Agency and other providers certified by DMH.