I50.1 Left ventricular failure, unspecified

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Cardiac asthma
• Edema of lung with heart disease NOS
• Edema of lung with heart failure
• Left heart failure
• Pulmonary edema with heart disease NOS
• Pulmonary edema with heart failure

Excludes1 (never code together)

• edema of lung without heart disease or heart failure (J81.-)
• pulmonary edema without heart disease or failure (J81.-)

Applies from I50 Heart failure

Excludes2 (not included here)

• cardiac arrest (I46.-)
• neonatal cardiac failure (P29.0)

Code first

• heart failure complicating abortion or ectopic or molar pregnancy (O00-O07, O08.8)
• heart failure due to hypertension (I11.0)
• heart failure due to hypertension with chronic kidney disease (I13.-)
• heart failure following surgery (I97.13-)
• obstetric surgery and procedures (O75.4)
• rheumatic heart failure (I09.81)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 226 — Heart Failure, Except End-Stage and Acute
• CMS-HCC V22: HCC 85 — Congestive Heart Failure
• RxHCC V08: HCC 186 — Heart Failure
• ESRD V24: HCC 85

MS-DRG index

Defines the logic of DRG(s) 291-293 in MDC 05.

Approximate ICD-9-CM (GEMs)

• 428.1 Left heart failure

Code annotations containing back-references to I50.1

Back-references to I50.1

• Type 1 Excludes: J81 Pulmonary edema ("pulmonary edema with heart disease NOS (I50.1)")
• Type 1 Excludes: J81 Pulmonary edema ("pulmonary edema with heart failure (I50.1)")

Back-references to I50

• Code Also: E83.820 Generalized arterial calcification of infancy with unspecified genetic causality ("heart failure (I50.-)")
• Code Also: E83.821 ENPP1 deficiency causing generalized arterial calcification of infancy ("heart failure (I50.-)")
• Code Also: E83.823 ABCC6 deficiency causing generalized arterial calcification of infancy ("heart failure (I50.-)")
• Use Additional: I09.81 Rheumatic heart failure ("code to identify type of heart failure (I50.-)")
• Use Additional: I11.0 Hypertensive heart disease with heart failure ("code to identify type of heart failure (I50.-)")
• Use Additional: I13.0 Hypertensive heart and chronic kidney disease with heart failure and stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease ("code to identify type of heart failure (I50.-)")
• Use Additional: I13.2 Hypertensive heart and chronic kidney disease with heart failure and with stage 5 chronic kidney disease, or end stage renal disease ("code to identify type of heart failure (I50.-)")
• Use Additional: I16.1 Hypertensive emergency ("acute pulmonary edema (left and/or right ventricular failure) (J81.0, I50.-)")
• Code First: I5A Non-ischemic myocardial injury (non-traumatic) ("heart failure (I50.-)")
• Use Additional: I97.13 Postprocedural heart failure ("code to identify the heart failure (I50.-)")
• Type 2 Excludes: J91 Pleural effusion in conditions classified elsewhere ("pleural effusion in heart failure (I50.-)")

Diagnosis Index entries for I50.1

• Asthma, asthmatic (bronchial) (catarrh) (spasmodic) › cardiobronchial
• Asthma, asthmatic (bronchial) (catarrh) (spasmodic) › heart
• Asthma, asthmatic (bronchial) (catarrh) (spasmodic) › Rostan's
• Disease, diseased › heart (organic) › with › pulmonary edema (acute)
• Edema, edematous (infectious) (pitting) (toxic) › lung › meaning failure, left ventricle
• Failure, failed › ventricular › left
• Stone (s) › heart syndrome
• Syndrome › cardiac asthma
• Syndrome › Ridley's
• Syndrome › stone heart

Nearby codes

• I50 Heart failure
• I50.1 Left ventricular failure, unspecified (this code)
• I50.2 Systolic (congestive) heart failure
• I50.20 Unspecified systolic (congestive) heart failure
• I50.21 Acute systolic (congestive) heart failure
• I50.22 Chronic systolic (congestive) heart failure
• I50.23 Acute on chronic systolic (congestive) heart failure