MC80-MC8Y block
Symptoms or signs involving the circulatory system
10 subordinate codes
MC80Abnormal blood-pressure reading, without diagnosis of hypertension or hypotensionMC81Abnormalities of heart beatMC82Cardiac arrestMC83Cardiac murmurs or other cardiac soundsMC84Cardiovascular painMC85GangreneMC86Precordial painMC87Pressure or tightness of heartMC88Prominent veins4B4YOther specified diseases of the immune system