Cal. Welf. & Inst. Code § 14115.2

(a) The department shall not require nursing facilities or any category of intermediate care facility for the developmentally disabled, as defined in Section 1250 of the Health and Safety Code to originate monthly bills for beneficiaries if the following conditions are met:
1. (1) A claim on which inpatient per diem days have been billed by the provider is received by the fiscal intermediary by the fifth working day of the month following the month being billed; and
2. (2) The claim received by the fiscal intermediary does not show a patient status code that indicates discharge or death on the last day billed for the recipient for that month.
(b) When the conditions listed above are met, the fiscal intermediary shall, by the 20th of the month, mail to the provider a preimprinted claim to cover the current month’s services to those beneficiaries.
(c) The provider shall be required to check the preimprinted claim for accuracy, to make corrections, and to certify that the beneficiaries who are listed on the claim received the services listed.
(d) The preimprinted claim shall be returned in the manner required by Section 14115; provided, the preimprinted claim shall be deemed a late submission no earlier than six months following the end of the month of service being billed.
(e) Except as otherwise provided in this section, the rights and duties of providers and the department with respect to the billing procedures hereby established shall be governed by the provisions of this chapter.