(a) A health maintenance organization or an insurer that uses a preauthorization process for health care services may not require a physician or provider to obtain preauthorization for a particular health care service if, in the most recent six-month evaluation period, as described by Subsection (b), the health maintenance organization or insurer has approved or would have approved not less than 90 percent of the preauthorization requests submitted by the physician or provider for the particular health care service.
(b) Except as provided by Subsection (c), a health maintenance organization or insurer shall evaluate whether a physician or provider qualifies for an exemption from preauthorization requirements under Subsection (a) once every six months.

(c) A health maintenance organization or insurer may continue an exemption under Subsection (a) without evaluating whether the physician or provider qualifies for the exemption under Subsection (a) for a particular evaluation period.
(d) A physician or provider is not required to request an exemption under Subsection (a) to qualify for the exemption.