I05.9 Rheumatic mitral valve disease, unspecified

Billable ICD-10-CM code, FY2026.

Applicable to

• Rheumatic mitral (valve) disorder (chronic) NOS

Applies from I05 Rheumatic mitral valve diseases

Includes

• conditions classifiable to both I05.0 and I05.2-I05.9, whether specified as rheumatic or not

Excludes1 (never code together)

• mitral valve disease specified as nonrheumatic (I34.-)
• mitral valve disease with aortic and/or tricuspid valve involvement (I08.-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 394.9 Other and unspecified mitral valve diseases (approximate)

Code annotations containing back-references to I05.9

Back-references to I05.9

• Type 1 Excludes: I34 Nonrheumatic mitral valve disorders ("mitral valve disease (I05.9)")

Back-references to I05

• Type 1 Excludes: I01 Rheumatic fever with heart involvement ("chronic diseases of rheumatic origin (I05-I09) unless rheumatic fever is also present or there is evidence of reactivation or activity of the rheumatic process.")
• Code Also: I27.22 Pulmonary hypertension due to left heart disease ("rheumatic mitral valve diseases (I05.-)")
• Type 1 Excludes: I34 Nonrheumatic mitral valve disorders ("mitral valve disorder specified as rheumatic (I05.-)")
• Type 2 Excludes: I51 Complications and ill-defined descriptions of heart disease ("heart disease specified as rheumatic (I00-I09)")

Diagnosis Index entries for I05.9

• Disease, diseased › heart (organic) › mitral
• Disease, diseased › mitral (valve)
• Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular) › mitral (chronic) (double) (fibroid) (heart) (inactive) (valve) (with chorea)
• Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular) › mitral (chronic) (double) (fibroid) (heart) (inactive) (valve) (with chorea) › with › rheumatic fever (conditions in I00) › inactive or quiescent (with chorea)
• Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) › rheumatic (active) (acute) (chronic) (subacute) › inactive or quiescent with › endocarditis › mitral (valve)
• Lesion (s) (nontraumatic) › mitral

Nearby codes

• I05 Rheumatic mitral valve diseases
• I05.0 Rheumatic mitral stenosis
• I05.1 Rheumatic mitral insufficiency
• I05.2 Rheumatic mitral stenosis with insufficiency
• I05.8 Other rheumatic mitral valve diseases
• I05.9 Rheumatic mitral valve disease, unspecified (this code)