Acute myocarditis, unspecified
Billable / specific
I40.9 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.
Inclusion terms
Includes (from I40)
- subacute myocarditis
Excludes1
Not coded here — never report together with this code.
Excludes2
Not included here — may be reported together when both conditions exist.
- certain conditions originating in the perinatal period (P04-P96) (from I40)
- certain infectious and parasitic diseases (A00-B99) (from I40)
- complications of pregnancy, childbirth and the puerperium (O00-O9A) (from I40)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99) (from I40)
- endocrine, nutritional and metabolic diseases (E00-E88) (from I40)
- injury, poisoning and certain other consequences of external causes (S00-T88) (from I40)
- neoplasms (C00-D49) (from I40)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94) (from I40)
- systemic connective tissue disorders (M30-M36) (from I40)
- transient cerebral ischemic attacks and related syndromes (G45.-) (from I40)
Also known as
- Myocarditis, active
- Myocarditis, acute or subacute
- Myocarditis, nonrheumatic, active
- Myocarditis, parenchymatous
- Rupture, ruptured, cardiac, infectional
Parent code
- I40Acute myocarditisHeader