Washington Revised Code Title 9. Crimes and Punishments § 9.41.097. Supplying information on the eligibility of persons to possess firearms, purchase firearms, or be issued a concealed pistol license

(1) The health care authority, mental health institutions, and other health care facilities shall, upon request of a court, law enforcement agency, or the state, supply such relevant information as is necessary to determine the eligibility of a person to possess a firearm, to be issued a concealed pistol license under RCW 9.41.070, or to purchase a firearm under RCW 9.41.090.

(2) Mental health information received by: (a) The department of licensing pursuant to RCW 9.41.047 or 9.41.173; (b) an issuing authority pursuant to RCW 9.41.047 or 9.41.070; (c) a chief of police or sheriff pursuant to RCW 9.41.090 or 9.41.173; (d) a court or law enforcement agency pursuant to subsection (1) of this section; or (e) the Washington state patrol firearms background check program pursuant to RCW 9.41.090, shall not be disclosed except as provided in RCW 42.56.240(4).