Iowa Code § 347A.6: Collection of accounts.

It shall be the duty of the hospital trustees either by themselves or through the superintendent or similar person to make collections of all accounts for hospital services. Such account shall be payable on presentation to the person liable thereby of an itemized statement and if not paid or secured within sixty days after such presentation the said trustees shall proceed to enforce collections by such means as are necessary and are authorized to employ any person for that purpose and, if legal proceedings are required, may employ counsel, the employment in either event to be on such arrangement for compensation as the hospital trustees deem appropriate.