No health care service contractor under this chapter may refuse to issue any contract or cancel or decline to renew the contract solely because of a mastectomy or lumpectomy performed on the insured or prospective insured more than five years previously. The amount of benefits payable, or any term, rate, condition, or type of coverage shall not be restricted, modified, excluded, increased, or reduced solely on the basis of a mastectomy or lumpectomy performed on the insured or prospective insured more than five years previously.

Effective date—1985 c 54: See note following RCW 48.20.397.