R78: Findings of drugs and other substances, not normally found in blood

R78.7: Finding of abnormal level of heavy metals in blood

Heavy metals include lead, mercury and arsenic, for example. A certain amount of these substances in the body can lead to poisoning. You may have many different symptoms in the case of poisoning. It depends how much is already in the body already and how long it has been there. You may also have problems with your bowel or your nerves, for example.