ICD-10 Code I50.30 – Unspecified diastolic (congestive) heart failure (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I50.30 – Unspecified diastolic (congestive) heart failure
What it is
This code identifies heart failure with a diastolic pattern, but the record does not specify whether it is acute, chronic, or acute on chronic. Use it when documentation supports diastolic heart failure and no further detail is available.
Clinical signs
Common findings include shortness of breath, fatigue, fluid retention, and signs of congestion. Clinical features vary; refer to documentation for evidence of impaired ventricular filling or heart failure noted by the provider.
When to use this code
Use I50.30 when the clinician documents diastolic heart failure or congestive heart failure with a diastolic component, but does not state the episode type. It is appropriate when the note lacks acuity details or laterality is not relevant. If the record is more specific, code the documented type instead.
Do not use for
Do not use this code for systolic heart failure, combined systolic and diastolic failure, or heart failure with a clearly stated acute or chronic pattern. Check documentation if the provider uses nonspecific terms that may support a different code.
Coding tip
Query the provider when the note says “CHF” but does not clarify whether the failure is diastolic, systolic, or combined.