The director of health may, upon the recommendation of the superintendent of the state hospital, provide care in a suitable boarding home for any patient in a state hospital, if the condition of the patient is such that his and the public welfare will not be prejudiced thereby. A patient in a boarding home shall be deemed to be a patient of the state hospital from which he was removed and shall, on the approval of the superintendent, be placed under the supervision of a psychiatric social worker employed by the state hospital. All patients in such homes shall be visited at least once every three months and if upon the visitation they are found to be abused, neglected or improperly cared for, they shall be returned to the state hospital or placed in a better boarding home. The cost of the boarding home care shall be paid by the state hospital from which he was removed.