I38 Endocarditis, valve unspecified

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Includes

• endocarditis (chronic) NOS
• valvular incompetence NOS
• valvular insufficiency NOS
• valvular regurgitation NOS
• valvular stenosis NOS
• valvulitis (chronic) NOS

Excludes1 (never code together)

• congenital insufficiency of cardiac valve NOS (Q24.8)
• congenital stenosis of cardiac valve NOS (Q24.8)
• endocardial fibroelastosis (I42.4)
• endocarditis specified as rheumatic (I09.1)

Applies from I38 Endocarditis, valve unspecified

Includes

• endocarditis (chronic) NOS
• valvular incompetence NOS
• valvular insufficiency NOS
• valvular regurgitation NOS
• valvular stenosis NOS
• valvulitis (chronic) NOS

Excludes1 (never code together)

• congenital insufficiency of cardiac valve NOS (Q24.8)
• congenital stenosis of cardiac valve NOS (Q24.8)
• endocardial fibroelastosis (I42.4)
• endocarditis specified as rheumatic (I09.1)

MS-DRG index

Defines the logic of DRG(s) 306-307 in MDC 05.

Approximate ICD-9-CM (GEMs)

• 424.90 Endocarditis, valve unspecified, unspecified cause (approximate)
• 424.99 Other endocarditis, valve unspecified (approximate)

Code annotations containing back-references to I38

Back-references to I38

• Type 1 Excludes: I08 Multiple valve diseases ("endocarditis, valve unspecified (I38)")
• Type 2 Excludes: I08 Multiple valve diseases ("multiple valve disease specified as nonrheumatic (I34.-, I35.-, I36.-, I37.-, I38.-, Q22.-, Q23.-, Q24.8-)")
• Type 1 Excludes: I09.1 Rheumatic diseases of endocardium, valve unspecified ("endocarditis, valve unspecified (I38)")
• Type 1 Excludes: I33 Acute and subacute endocarditis ("endocarditis NOS (I38)")

Back-references to I38

• Type 1 Excludes: I08 Multiple valve diseases ("endocarditis, valve unspecified (I38)")
• Type 2 Excludes: I08 Multiple valve diseases ("multiple valve disease specified as nonrheumatic (I34.-, I35.-, I36.-, I37.-, I38.-, Q22.-, Q23.-, Q24.8-)")
• Type 1 Excludes: I09.1 Rheumatic diseases of endocardium, valve unspecified ("endocarditis, valve unspecified (I38)")
• Type 1 Excludes: I33 Acute and subacute endocarditis ("endocarditis NOS (I38)")

Diagnosis Index entries for I38

• Disease, diseased › valve, valvular
• Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular)
• Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular) › arteriosclerotic
• Hypertrophy, hypertrophic › heart (idiopathic) › valve
• Insufficiency, insufficient › valve, valvular (heart)
• Stenosis, stenotic (cicatricial) › heart valve
• Stenosis, stenotic (cicatricial) › valve (cardiac) (heart)
• Stricture › heart › valve

Nearby codes

• I38 Endocarditis, valve unspecified (this code)