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UNOFFICIAL 1736-10 (1) Billings and account ledgers; (2) Records of patient appointments; (3) Patient history forms, medical records, diagnosis, and orders prescribed and treatment plans; (4) Records of requests for and results of tests and examinations ordered or furnished; (5) Records of prescriptions, medications, assistive devices, or appliances prescribed, ordered, or furnished; and (6) All records which are necessary to justify the amount of claims for payment which are determined by cost reimbursement or a similar basis, including billing documents showing the cost of services or supplies provided to the recipient.