Cal. INS § 10123.61

(a) Commencing January 1, 2019, a health insurer shall not issue, amend, sell, renew, or offer a policy of short-term limited duration health insurance in this state. (b) For purposes of this section, “short-term limited duration health insurance” means health insurance coverage provided pursuant to a health insurance policy that has an expiration date specified in the policy that is less than 12 months after the original effective date of the coverage.