Treatment on Demand Assistance Act

Treatment on Demand Assistance Act - Amends the Public Health Service Act to direct the Secretary of Health and Human Services, acting through the Director of the Center for Substance Abuse Treatment, to, for the purpose of providing substance abuse treatment services: (1) award grants, contracts, or cooperative agreements to public and private nonprofit entities, including Native Alaskan entities and Indian tribes and tribal organizations; and (2) award block grants to States. Requires giving priority in awarding grants to applicants proposing to eliminate waiting lists of treatment on demand programs.

Directs the Attorney General, in consultation with the Secretary, shall award grants to eligible States to enable such States, either directly or through the provision of assistance to counties or local municipalities, to provide drug treatment services to individuals who have been convicted of non-violent drug possession offenses and diverted from incarceration because of the enrollment of such individuals into community-based drug treatment programs.

Requires a study by the General Accounting Office of the use funds under this Act.