Wis. Stat. § 50.355

Every 12 months, on a schedule determined by the department, an approved hospital shall submit an annual report in the form and containing the information that the department requires, including payment of the fee required under s. 50.135 (2) (a). If a complete annual report is not timely filed, the department shall issue a warning to the holder of the certificate for approval. The department may revoke approval for failure to timely and completely report within 60 days after the report date established under the schedule determined by the department.