I50.23
BillableAcute on chronic systolic (congestive) heart failure
HCC Category Mapping
V28HCC 224 — Acute on Chronic Heart Failure
0.268V24HCC 85 — Congestive Heart Failure
0.368ESRDHCC 85 — Congestive Heart Failure
0.000RxHCCHCC 186 — Heart Failure
0.000What This Code Means
A sudden worsening of a long-standing heart pumping problem where the left chamber cannot effectively move blood, causing acute symptoms on top of chronic disease.
Coding Tips
- •Requires documentation of both chronic systolic heart failure AND acute decompensation or exacerbation
- •Look for terms like 'acute on chronic,' 'acute exacerbation of chronic,' or evidence of recent clinical deterioration
Clinical Significance
Acute on chronic systolic congestive heart failure is one of the highest-acuity heart failure codes, representing acute decompensation superimposed on known chronic systolic dysfunction. These patients frequently require hospitalization, intravenous therapies, and intensive monitoring. This code carries the most significant risk adjustment weight among systolic heart failure codes in the V28 model.
Documentation Requirements
- ✓Documentation must clearly indicate BOTH chronic systolic heart failure AND an acute exacerbation or decompensation
- ✓Evidence of chronic disease: history of heart failure, reduced ejection fraction, ongoing medications
- ✓Evidence of acute worsening: new or worsening symptoms, increased edema, respiratory distress, hospitalization
- ✓Precipitating factor for acute decompensation if identified
- ✓Current treatment plan addressing both the acute episode and chronic management
- ✓Ejection fraction and functional status assessment
Commonly Confused Codes
I50.21 — Acute systolic heart failure: use only for truly new onset acute disease without pre-existing chronic heart failureI50.22 — Chronic systolic heart failure: use when chronic disease is stable without acute worseningI50.43 — Acute on chronic combined systolic and diastolic heart failure: use when both systolic and diastolic components are documentedI50.33 — Acute on chronic diastolic heart failure: use when only diastolic dysfunction with acute exacerbation is documentedI50.813 — Acute on chronic right heart failure: specifically right-sided heart failure
Code Hierarchy
└I50Heart failure└I50.2Systolic (congestive) heart failure└I50.23Acute on chronic systolic (congestive) heart failure
└I50.23Acute on chronic systolic (congestive) heart failure