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.
1 Myocardium. 2  The myocardium is the muscular middle layer of the heart wall that contains the cardiac muscle tissue. 3  Myocardium makes up the majority of the thickness and mass of the heart wall and is the part of the heart responsible for pumping blood.