W. Va. Code § 11-15-9i
(b) Notwithstanding any provision of this article, article 15A or article 15B of this chapter, the purchase of durable medical equipment, as defined in §11-15B-2 of this code, to be dispensed upon prescription by a health care provider and intended for use in the diagnosis, cure, mitigation, treatment or prevention of injury or disease is exempt from the tax imposed by this article: Provided, That the durable medical equipment is purchased by an individual for exclusive use by the purchaser or another individual and used predominantly by the recipient individual in his or her home environment.
(d) Definitions. — The following definitions shall apply: