28 CCR §1300.71(a)(6)

(a)(6): “Date of receipt” means the working day when a claim, by physical or electronic means, is first delivered to either the plan’s specified claims payment office, post office box, or designated claims processor or to the plan’s capitated provider for that claim. This definition shall not affect the presumption of receipt of mail set forth in Evidence Code section 641. In the situation where a claim is sent to the incorrect party, the “date of receipt” shall be the working day when the claim, by physical or electronic means, is first delivered to the correct party responsible for adjudicating the claim.