Michigan Compiled Laws, Chapter 500. Insurance Code of 1956 § 500.3426

Sec. 3426. (1) An insurer that delivers, issues for delivery, or renews in this state a group health insurance policy may offer group wellness coverage.An insurer may provide for an appropriate rebate or reduction in premiums or for reduced copayments, coinsurance, or deductibles, or a combination of these incentives, for participation in any health behavior wellness, maintenance, or improvement program offered by the employer. The employer shall provide evidence of demonstrative maintenance or improvement of the insureds' or enrollees' health behaviors as determined by assessments of agreed-upon health status indicators between the employer and the insurer. Any rebate of premium provided by the insurer is presumed to be appropriate unless credible data demonstrate otherwise, but must not exceed 50% of paid premiums for tobacco cessation programs or 30% of paid premiums for other wellness programs, unless otherwise approved by the director. An insurer shall make available to employers all wellness coverage plans that the insurer markets to employers in this state.

(2) An insurer that delivers, issues for delivery, or renews in this state an individual or family health insurance policy may offer individual and family wellness coverage.An insurer may provide for an appropriate rebate or reduction in premiums or for reduced copayments, coinsurance, or deductibles, or a combination of these incentives, for participation in any health behavior wellness, maintenance, or improvement program approved by the insurer. The insured or enrollee shall provide evidence of demonstrative maintenance or improvement of the individual's or family's health behaviors as determined by assessments of agreed-upon health status indicators between the insured and the insurer. Any rebate of premium provided by the insurer is presumed to be appropriate unless credible data demonstrate otherwise, but must not exceed 50% of paid premiums, unless otherwise approved by the director. An insurer shall make available to individuals and families all wellness coverage plans that the insurer markets to individuals and families in this state.

(3) An insurer is not required to continue any health behavior wellness, maintenance, or improvement program or to continue any incentive associated with a health behavior wellness, maintenance, or improvement program.

(4) A health behavior wellness, maintenance, or improvement program under this section may include other requirements in addition to those that are specific to health behavior wellness, maintenance, or improvement, if the program, taken as a whole, meets the intent of this section.