CA Ins Code §10123.13(a)

“Every insurer issuing group or individual policies of health insurance that covers hospital, medical, or surgical expenses, including those telehealth services covered by the insurer as defined in subdivision (a) of Section 2290.5 of the Business and Professions Code , shall reimburse claims or any portion of any claim, whether in state or out of state, for those expenses as soon as practical, but no later than 30 working days after receipt of the claim by the insurer unless the claim or portion thereof is contested by the insurer, in which case the claimant shall be notified, in writing, that the claim is contested or denied, within 30 working days after receipt of the claim by the insurer.”