Z86: Personal history of certain other diseases

Z86.2: Personal history of diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism

The bone marrow is inside bone. The blood cells are formed in the bone marrow of some of the bones. There are 3 different types of blood cell: red blood cells, white blood cells and platelets. Red blood cells are important for carrying oxygen in the blood. White blood cells are part of the body’s immune system. They fight pathogens. Platelets are important for clotting blood.

Sometimes such a disease may cause symptoms to develop later, or symptoms may remain.