(1) The provisions of this chapter shall not apply in respect to the use of:
(a) Prosthetic devices prescribed, fitted, or furnished for an individual by a person licensed under the laws of this state to prescribe, fit, or furnish prosthetic devices, and the components of such prosthetic devices;
(b) Medicines of mineral, animal, and botanical origin prescribed, administered, dispensed, or used in the treatment of an individual by a person licensed under chapter
18.36A RCW; and
(c) Medically prescribed oxygen, including, but not limited to, oxygen concentrator systems, oxygen enricher systems, liquid oxygen systems, and gaseous, bottled oxygen systems prescribed for an individual by a person licensed under chapter
18.57 or
18.71 RCW for use in the medical treatment of that individual.
(2) In addition, the provisions of this chapter shall not apply in respect to the use of labor and services rendered in respect to the repairing, cleaning, altering, or improving of any of the items exempted under subsection (1) of this section.
(3) The exemption provided by subsection (1) of this section shall not apply to the use of durable medical equipment, other than as specified in subsection (1)(c) of this section, or mobility enhancing equipment.
(4) "Prosthetic device," "durable medical equipment," and "mobility enhancing equipment" have the same meanings as in RCW
82.08.0283.