Wis. Stat. § 631.17: Written reason for coverage denial.

(1) In this section, “disability insurance policy” has the meaning given in s. 632.895 (1) (a).

(2) An insurer that denies coverage under an individual or group life or disability insurance policy or a certificate of group life or disability insurance shall advise the applicant or proposed insured in writing of the reasons for the denial.