I31.3Pericardial effusion (noninflammatory)

I31.3 is the ICD-10-CM diagnosis code for pericardial effusion (noninflammatory). It belongs to category I31 (other diseases of pericardium), block I30-I5A (other forms of heart disease) and chapter 9 (diseases of the circulatory system). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within I31 (other diseases of pericardium), I31.3 is specifically for pericardial effusion (noninflammatory). Related codes cover chronic adhesive pericarditis (I31.0), chronic constrictive pericarditis (I31.1), hemopericardium, not elsewhere classified (I31.2), cardiac tamponade (I31.4), other specified diseases of pericardium (I31.8) and disease of pericardium, unspecified (I31.9).

To report this condition, pick the subcode that matches the documentation: I31.31 (elsewhere) and I31.39 ((noninflammatory)).

Don't report I31.3 together with the conditions in its Excludes1 note: acute pericardial effusion (I30.9).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015, and changed in FY2023 (expanded into subcodes).

Before ICD-10, this condition was coded in ICD-9-CM as 423.9 (unspecified disease of pericardium).