Diseases of the Circulatory System

ICD-10 Code: I50.9

Heart Failure, Unspecified

Heart failure without specification of type (systolic vs. diastolic, acute vs. chronic).

Clinical Information

HF affects 6.2 million US adults. Inability of heart to pump adequate blood. I50.9 used when type not specified. Prefer specific codes when EF known (I50.2x systolic, I50.3x diastolic).

Coding Guidelines

  • 1Use only when HF type unknown
  • 2If EF known, use I50.2x (systolic) or I50.3x (diastolic)
  • 3Specify acute (I50.x1) vs. chronic (I50.x2) when possible

Common Uses

  • Heart failure documented without echo/type specified

Related ICD-10 Codes

I50.22Chronic systolic heart failure
I50.32Chronic diastolic heart failure

Documentation Requirements

  • Document 'heart failure' or 'CHF'
  • EF from echo when available
  • Acute vs. chronic

Real-World Coding Examples

Patient with 'CHF' on diuretic, no recent echo. Diagnosis: Heart failure, unspecified (I50.9)

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Medical coding for Diseases of the Circulatory System