Medical tubing for dialysis, blood transfusions, drainage, oxygen, intravenous use, feeding, suction, stethoscopes, and fluid delivery, all of the foregoing coded for identification and differentiation; medical tubing and identification markers designed for dialysis, blood transfusions, drainage, oxygen, intravenous use, feeding, suction, stethoscopes, and fluid delivery coded for identification and differentiation; medical identification markers designed for use with intravenous tubing for drainage and transfusion coded for identification and differentiation; medical identification markers designed for use with administering drugs and fluids coded for identification and differentiation; medical identification markers designed for use with medical tubing for intravenous use, and fluid delivery, all of the foregoing coded for identification and differentiation; medical identification markers designed for use with medical, surgical, epidural, and intravenous catheters, all of the foregoing coded for identification and differentiation; medical identification markers designed for use with intravenous tubing coded for identification and differentiation