The ATTC Network is an international, multidisciplinary resource for professionals in the addictions treatment and recovery services field.

Established in 1993 by the Substance Abuse and Mental Health Services Administration (SAMHSA), the ATTC Network is comprised of 10 U.S.-based Centers, 6 International HIV Centers (funded by PEPFAR), 2 National Focus Area Centers, and a Network Coordinating Office. Together the Network serves the 50 U.S. states, the District of Columbia, Puerto Rico, the U.S. Virgin Islands, and the Pacific Islands of Guam, American Samoa, Palau, the Marshall Islands, Micronesia, and the Mariana Islands. The International HIV ATTCs serve Vietnam, Southeast Asia, South Africa, and Ukraine.