Experimental Treatments for Terminal Conditions and Life-threatening Rare Diseases; Citing this act as the “Promising Pathways Act"; authorizing licensed physicians to prescribe and eligible facilities to administer experimental treatments, if certain requirements are met; requiring the Department of Health to establish and maintain a patient registry for specified purposes; encouraging health insurers and health maintenance organizations to provide specified insurance coverage for experimental treatments; authorizing licensed physicians and eligible facilities to receive reimbursement for the prescription or administration of experimental treatments if certain requirements are met; requiring manufacturers of experimental treatments to provide for a specified temporary price concession set by the department, etc.