Tex. Ins. Code § 1575.355
(a) The following are not liable for damages arising from an act or omission of a health care provider participating in the network:
Added by Acts 2001, 77th Leg., ch. 1419, Sec. 3, eff. June 1, 2003.
Amended by Acts 2003, 78th Leg., ch. 1276, Sec. 10A.444, eff. Sept. 1, 2003.