I50.9 ICD-10-CA code: Heart failure, unspecified
I50.9 is the ICD-10-CA code for “Heart failure, unspecified” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
I50.9Heart failure, unspecified
Short description: Heart failure unspecified
ICD-10-CA · Canada · Also written I509
Index terms
Entries in CIHI’s alphabetical index that lead to I50.9. Searching the index by the condition the note names is how coders reach this code.
- Paresis, heart
- Collapse, heart
- Fatigue, myocardium
- Sudden, heart failure
- Failure, failed, cardiac
- Asthenia, asthenic, heart
- Weak, weakness, myocardium
- Asthenia, asthenic, cardiac
- Failure, failed, ventricular
- Asthenia, asthenic, myocardial
- Weak, weakness, heart, cardiac
- Exhaustion (physical NEC), heart
- Asthenia, asthenic, cardiovascular
- Exhaustion (physical NEC), cardiac
- Insufficiency, insufficient, heart
- Insufficiency, insufficient, cardiac
- Failure, failed, cardiorenal (chronic)
- Failure, failed, myocardial, myocardium
- Failure, failed, heart (acute) (sudden) (senile)
- Exhaustion (physical NEC), myocardium, myocardial
- Insufficiency, insufficient, myocardial, myocardium
- Paralysis, paralytic (complete) (incomplete), cordis
- Failure, failed, cardiac, in (due to) diabetes mellitus
- Impaired, impairment (function), myocardium, myocardial
- Failure, failed, heart (acute) (sudden) (senile), with, decompensation
- Impaired, impairment (function), myocardium, myocardial, in (due to) diabetes mellitus
Notes for I50.9
As CIHI prints them, with any note I50.9 takes from the headings above it.
Includes
- Cardiac, heart or myocardial failure NOS
Use additional code
Add a code for this detail when the note documents it.
- Use additional code from (E10-E14) with fourth and fifth characters .52 to classify any associated diabetes mellitus.From I50 Heart failure
- Use additional code from (I11) (hypertensive heart disease) or (I13) (hypertensive heart and renal disease) for heart failure due to hypertensionFrom I50 Heart failure
Excludes
Conditions classified elsewhere.
- Complicating:• abortion or ectopic or molar pregnancy (O00-O07) (O08.8)• obstetric surgery and procedures (O75.4)following cardiac surgery or due to presence of cardiac prosthesis (I97.1)neonatal cardiac failure (P29.0)From I50 Heart failure
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)systemic connective tissue disorders (M30-M36)transient cerebral ischaemic attacks and related syndromes (G45.-)From Chapter 9: Diseases of the circulatory system (I00-I99)
Where I50.9 sits
- 1ChapterChapter 9: Diseases of the circulatory system (I00-I99)
- 2Block I30-I52Other forms of heart disease
- 3Category I50Heart failure
- 4Valid code I50.9Heart failure, unspecified
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code I50.9 mean?
I50.9 is the ICD-10-CA code for “Heart failure, unspecified” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is I50.9 in ICD-10-CA?
I50.9 sits under I50 Heart failure, within I30-I52 Other forms of heart disease, within Chapter 9: Diseases of the circulatory system (I00-I99).
What coding notes apply to I50.9?
ICD-10-CA lists Includes, Use additional code, Excludes notes for I50.9, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.