California Code, Welfare and Institutions Code - WIC § 14413

(a) Requests for disenrollment shall be made to an authorized representative of the prepaid health plan or to the department. All requests for disenrollment, except those submitted pursuant to subdivision (c) of Section 14303.1, subdivision (c) of Section 14303.2, or paragraph (6) of subdivision (b) of Section 14409, or for other good cause as determined by the director, shall be processed through the prepaid health plan's grievance procedure as approved by the department. Disenrollment requests received by the prepaid health plan shall be submitted to the department, on standard disenrollment forms prescribed by the department, within a reasonable time following the date of such signed request, as determined by the director, to permit the department to terminate enrollment effective the beginning of the first calendar month following a full calendar month after the request is made.

(b) All applications for disenrollment shall be processed by the department, and where Medi-Cal eligibility continues or Medi-Cal coverage is extended under Section 14005.8, a Medi-Cal card shall be issued effective not later than the beginning of the first calendar month following a full calendar month after the request for disenrollment is made. Submittal of a request for disenrollment for processing through the grievance procedure of a prepaid health plan shall not be deemed to infringe on this entitlement.