1 ICD-9-CM 751.7 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 751.7 should only be used for claims with a date of service on or before September 30, 2015. 2  For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
The myocardium is located between the endocardium and the visceral layer of the serous membrane (epicardium) of the heart.
In particular, the myocardium is the muscle tissue of the heart and is found in between the epicardium and the endocardium. Similar to other types of muscles, the cardiac muscle is formed by the process of myogenesis and originates from its primordial cell, the cardiomyoblast.he skeletal muscle is the muscle attached to the skeleton and is responsible for the voluntary movement of the skeletal system. The smooth muscle is the type of muscle found in the viscera as well as blood vessels of the vertebrates. The cardiac muscle is the muscle of the heart.