2025 ICD-10-CM Diagnosis Code I40.1 - Free 2025 ICD-10-CM/PCS Medical Coding

Isolated myocarditis

I40.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
The 2025 edition of ICD-10-CM I40.1 became effective on October 1, 2024.
This is the American ICD-10-CM version of I40.1 – other international versions of ICD-10 I40.1 may differ.

Applicable To

The following code(s) above I40.1 contain annotation back-references

that may be applicable to I40.1:

Approximate Synonyms

Clinical Information

An often fatal inflammatory disorder that affects the myocardium. Morphologically, it is characterized by the presence of an inflammatory infiltrate in the myocardial tissue that includes multinucleated giant cells. It is often associated with the presence of an autoimmune disorder. Patients present with arrhythmias and/or heart failure. Heart transplantation is the only treatment option available.

ICD-10-CM I40.1 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):

Convert I40.1 to ICD-9-CMCode History

2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
2017 (effective 10/1/2016): No change
2018 (effective 10/1/2017): No change
2019 (effective 10/1/2018): No change
2020 (effective 10/1/2019): No change
2021 (effective 10/1/2020): No change
2022 (effective 10/1/2021): No change
2023 (effective 10/1/2022): No change
2024 (effective 10/1/2023): No change
2025 (effective 10/1/2024): No change

Diagnosis Index entries containing back-references to I40.1: