This subchapter does not apply to:
(1) a small employer health benefit plan; or
(2) a group model health maintenance organization that is a nonprofit, state-certified health maintenance organization that:
(A) provides the majority of its professional services through a single group medical practice that is governed by a board composed entirely of physicians; and
(B) educates medical students or resident physicians through a contract with the medical school component of a Texas state-supported college or university accredited by the Accreditation Council on Graduate Medical Education or the American Osteopathic Association.