(a) For contractual purposes, a health intervention shall be covered if it is an otherwise covered category of service, not specifically excluded, recommended by the treating licensed health care provider, and determined by the health plan’s medical director to be medically necessary as defined in subsection (b). A health intervention may be medically indicated and not qualify as a covered benefit or meet the definition of medical necessity. A managed care plan may choose to cover health interventions that do not meet the definition of medical necessity.