I51.7 Cardiomegaly

Billable ICD-10-CM code, FY2026.

Applicable to

• Cardiac dilatation
• Cardiac hypertrophy
• Ventricular dilatation

Excludes1 (never code together)

• cardiomegaly due to hypertension (I11.-)
• cardiomegaly due to hypertension and chronic kidney disease (I13.-)

Applies from I51 Complications and ill-defined descriptions of heart disease

Excludes2 (not included here)

• heart disease specified as rheumatic (I00-I09)

MS-DRG index

Defines the logic of DRG(s) 302-303 in MDC 05.

Approximate ICD-9-CM (GEMs)

• 429.3 Cardiomegaly

Code annotations containing back-references to I51.7

Back-references to I51.7

• Type 2 Excludes: I42 Cardiomyopathy ("ventricular hypertrophy (I51.7)")

Diagnosis Index entries for I51.7

• Athlete's › heart
• Cardiomegaly › idiopathic
• Hypertrophy, hypertrophic › cardiac (chronic) (idiopathic)
• Preponderance, left or right ventricular

Nearby codes

• I51.1 Rupture of chordae tendineae, not elsewhere classified
• I51.2 Rupture of papillary muscle, not elsewhere classified
• I51.3 Intracardiac thrombosis, not elsewhere classified
• I51.4 Myocarditis, unspecified
• I51.5 Myocardial degeneration
• I51.7 Cardiomegaly (this code)
• I51.8 Other ill-defined heart diseases
• I51.81 Takotsubo syndrome
• I51.89 Other ill-defined heart diseases
• I51.9 Heart disease, unspecified