Wash. Rev. Code § 4.24.810
(1) Except as provided in subsection (2) of this section, any health care provider credentialing or granting practice privileges to other health care providers to deliver health care in response to an emergency is immune from civil liability arising out of such credentialing or granting of practice privileges if:
(3) For purposes of this section:
(e) "Health care provider" means:
[ 2014 c 159 s 1.]