I39 Endocarditis and heart valve disorders in diseases classified elsewhere

Billable

Block: Other forms of heart disease (I30-I5A)

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