(a) This subchapter does not apply to coverage under:
(1) a blanket accident and health insurance policy, as described by Chapter 1251;
(2) a short-term travel policy;
(3) an accident-only policy;
(4) a limited or specified-disease policy that does not provide benefits for mental health care or similar services;
(5) except as provided by Subsection (b), a plan offered under Chapter 1551 or Chapter 1601;
(6) a plan offered in accordance with Section 1355.151; or
(7) a Medicare supplement benefit plan, as defined by Section 1652.002.
(b) For the purposes of a plan described by Subsection (a)(5), "serious mental illness" has the meaning assigned by Section 1355.001.