In this subchapter, "patient" includes a person who:
(1) is currently abusing a dangerous drug or controlled substance;
(2) is not currently abusing such a drug or substance but has a history of such abuse; or
(3) lives in an environment that poses a risk for misuse or diversion to illegitimate use of such a drug or substance.
Official text of the Texas Occupations Code as published by the Texas Legislative Council.