Endocarditis and heart valve disorders in diseases classified elsewhere (I39)
The ICD-10 code I39 is used to classify endocarditis and heart valve disorders that occur as part of other diseases. This category covers heart valve abnormalities and infections linked to specific underlying conditions rather than primary heart diseases.
This code encompasses a range of conditions, including endocarditis associated with infections like Histoplasma capsulatum or Histoplasma duboisii (also called African histoplasmosis), as well as various congenital and acquired abnormalities of the atrioventricular valves. These include valve stenosis, regurgitation, prolapse, dysplasia, and structural anomalies such as double orifice valves or abnormal chordae tendineae. Terms like "mycotic endocarditis" and "endocarditis associated with another disorder" relate here, helping clarify that these valve problems are secondary to or part of broader systemic diseases. Medical coders should use I39 when coding for endocarditis or valve irregularities attributed to diseases classified elsewhere, ensuring accurate documentation for complex cases involving multiple body systems.
Diseases of the circulatory system (I00–I99)
Other forms of heart disease (I30-I5A)
- I39 Endocarditis and heart valve disorders in diseases classified elsewhere
Endocarditis and heart valve disorders in diseases classified elsewhere (I39)
Instructional Notations
Code First
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
- underlying disease, such as:
- Q fever A78
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
