Tex. Ins. Code § 1367.153

A health benefit plan that provides coverage for a child who is younger than 18 years of age must define "reconstructive surgery for craniofacial abnormalities" under the plan to mean surgery to improve the function of, or to attempt to create a normal appearance of, an abnormal structure caused by congenital defects, developmental deformities, trauma, tumors, infections, or disease.