ICD-10-CM · Chapter 9 · I00-I99
I39 Endocarditis and heart valve disorders in diseases classified elsewhere
Excludes 1 (cannot be coded together)
- endocardial involvement in:
- candidiasis (B37.6)
- gonococcal infection (A54.83)
- Libman-Sacks disease (M32.11)
- listerosis (A32.82)
- meningococcal infection (A39.51)
- rheumatoid arthritis (M05.31)
- syphilis (A52.03)
- tuberculosis (A18.84)
- typhoid fever (A01.02)
Code First
- underlying disease, such as:
- Q fever (A78)
This category is a complete, billable diagnosis code.
No additional specificity is required — submit I39 directly on claims and documentation without a subcode extension.
Last reviewed: September 2026