Texas Insurance Code - INS § 1251.151. Coverage for Certain Grandchildren

(a) A group policy or contract of insurance for hospital, surgical, or medical expenses incurred as a result of accident or sickness, including a group contract issued by a group hospital service corporation, that provides coverage under the policy or contract for a child of an insured must, on payment of a premium, provide coverage for any grandchild of the insured if the grandchild is:

(b) Coverage for a grandchild of the insured under this section may not be terminated solely because the covered grandchild is no longer a dependent of the insured for federal income tax purposes.