ICD-10-CM Diagnosis Code (2025)
Official Description for I40
Acute myocarditis
Coding Notes & Guidelines for I40
Includes Notes
subacute myocarditis
Excludes1: Not Coded Here
acute rheumatic myocarditis (I01.2)
Use Additional Code
code (B95-B97) to identify infectious agent
Inclusion Terms
Septic myocarditis
Inclusion Terms
- Fiedler's myocarditis
- Giant cell myocarditis
- Idiopathic myocarditis
Child Codes (More Specific Codes for I40):
About ICD-10-CM Code I40 (Acute myocarditis)
ICD-10-CM code I40 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM I40 became effective on October 1, 2024.
This page provides detailed information about I40 - Acute myocarditis. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Acute myocarditis.