RCW 26.26B.070: Proof of certain support and parentage establishment costs.

In all actions brought under this chapter or chapter 26.26A RCW, bills for pregnancy, childbirth, and genetic testing shall:

(1) Be admissible as evidence without requiring third-party foundation testimony; and

(2) Constitute prima facie evidence of amounts incurred for such services or for testing on behalf of the child.