The commissioner may adopt reasonable rules as necessary and proper to:
(1) implement this chapter and Section 1367.053, Subchapter A, Chapter 1452, Subchapter B, Chapter 1507, Chapters 222, 251, and 258, as applicable to a health maintenance organization, and Chapters 1271 and 1272, including rules to:
(A) prescribe authorized investments for a health maintenance organization for all investments not otherwise addressed in this chapter;
(B) ensure that enrollees have adequate access to health care services; and
(C) establish minimum physician-to-patient ratios, mileage requirements for primary and specialty care, maximum travel time, and maximum waiting time for obtaining an appointment; and
(2) meet the requirements of federal law and regulations.