(1) Subject to appropriation, a health plan offered to employees and their covered dependents under this chapter issued or renewed on or after January 1, 2019, must include coverage for hearing instruments. Coverage must include a new hearing instrument every five years and services and supplies such as the initial assessment, fitting, adjustment, and auditory training.

(2) The hearing instrument must be recommended by a licensed audiologist, hearing aid specialist, or a licensed physician or osteopathic physician who specializes in otolaryngology and dispensed by a licensed audiologist, hearing aid specialist, or a licensed physician or osteopathic physician who specializes in otolaryngology.

(3) For the purposes of this section, "hearing instrument" and "hearing aid specialist" have the same meaning as defined in RCW 18.35.010.

(4) This section expires December 31, 2023.