CA Health & Safety Code Section 127595

The department shall adopt the California uniform billing form formats for use in all health care payment programs it administers, including, but not limited to, Medi-Cal, county health services programs, and other health care payment programs, for each instance when a program provides coverage for professional health care services and for each instance when a program provides coverage for institutional provider services. The department may adapt the billing format for institutional provider services only to the extent necessary for the forms to be optically scanned and automatically microfilmed. The department shall provide exemptions from this requirement as necessary and appropriate to the efficient operation of health care service plans that do not reimburse providers on a fee-for-service basis, except that the plans shall use the formats in instances when the professional or institutional provider bills a plan for the specific services provided. The department shall implement this requirement in any Medi-Cal contract for fiscal intermediary services entered into on or after January 1, 1993.