Cal. Ins. Code § 10123.9

On and after January 1, 1980, every group policy of disability insurance which covers hospital, medical, or surgical expenses on a group basis, and which offers maternity coverage in such groups, shall also offer coverage for prenatal diagnosis of genetic disorders of the fetus by means of diagnostic procedures in cases of high-risk pregnancy. Such coverage shall be offered under such terms and conditions as may be agreed upon between the insurer and the group policyholder. Every group policy of disability insurance shall communicate the availability of such coverage to all group policyholders and to all groups with whom they are negotiating.