The Medical Services Unit provides direct medical care to over twenty thousand incarcerated inmates and oversees the medical care of ODOC inmates housed in private prisons. Four infirmaries provide special medical care for inmates, and the agency contracts with the Lindsay Memorial Hospital for more acute care which cannot be provided on-site. Inmates are able to access specialty care through the University of Oklahoma Health Sciences Center, as well as local hospitals and medical providers as the need arises.

Mental Health services are provided by a staff of professional psychiatrists, advance practice psychiatric nurses, psychologists, social workers, and master’s level psychological clinicians. Mental Health operates specialty housing units for the seriously mentally ill. These units are located at Joseph Harp Correctional Center in Lexington and Mabel Bassett Correctional Center in McLoud. The agency partners with the Oklahoma Department of Mental Health and Substance Abuse Services to coordinate reentry services for seriously mentally ill inmates. This partnership yields excellent results in successfully reintegrating this population back into the community with a decreased recidivism rate.