The person in charge of any private institution, hospital, or sanatorium which is conducted for, or includes a department or ward conducted for, the care and treatment of persons who are mentally ill or deranged may receive therein as a voluntary patient any person suffering from mental illness or derangement who is a suitable person for care and treatment in the institution, hospital, or sanatorium, who voluntarily makes a written application to the person in charge for admission into the institution, hospital or sanatorium. At the expiration of fourteen continuous days of treatment of a patient voluntarily committed in a private institution, hospital, or sanatorium, if the period of voluntary commitment is to continue, the person in charge shall forward to the office of the department of social and health services a record of the voluntary patient showing the name, residence, date of birth, sex, place of birth, occupation, social security number, marital status, date of admission to the institution, hospital, or sanatorium, and such other information as may be required by rule of the department of social and health services.