Every Hazelden location has at minimum a consulting physician and generally a physician on site during regular admission hours. Complete physical examinations are conducted during the first few days of admission when residential patients spend 24-48 hours in the medical services unit. These units are staffed around the clock by experienced addiction nurses 24 hours a day, seven days a week. Additional physicians, psychiatrists, and emergency hospital services are always available.

Accrediting agencies:

Hazelden's Newberg, Oregon location is accredited by the Commission on Accreditation of Rehabilitation Facilities.

Hazelden's locations in Center City, Plymouth, and St. Paul, Minnesota, as well as its facilities in Chicago and New York City are accredited by the Joint Commission.