ICD-10 Code for Congestive Heart Failure (CHF)
Also searched as heart failure
The ICD-10-CM code for congestive heart failure (CHF) is I50.9 — Heart failure, unspecified. It is billable for FY2027.
Congestive heart failure ICD-10 codes at a glance
| Condition | Congestive heart failure (CHF) |
|---|---|
| Code | I50.9 — Heart failure, unspecified |
| Billable | Yes (I50.9) |
| Alphabetic Index entry | Failure, failed, heart, congestive |
| Code set | ICD-10-CM FY2027, valid October 1, 2026 – September 30, 2027 |
What changes the congestive heart failure code?
The Alphabetic Index lists these qualifiers under Failure, failed, heart. If the record documents one of them, the code changes. Verify the code in the Tabular List before reporting it.
| with › decompensation | I50.9 | Heart failure, unspecified |
| arteriosclerotic | I70.90 | Unspecified atherosclerosis |
| biventricular | I50.82 | Biventricular heart failure |
| biventricular › due to left heart failure | I50.814 | Right heart failure due to left heart failure |
| combined left-right sided | I50.82 | Biventricular heart failure |
| combined left-right sided › due to left heart failure | I50.814 | Right heart failure due to left heart failure |
| compensated | I50.9 | Heart failure, unspecified |
| complicating › delivery | O75.4 | Other complications of obstetric surgery and procedures |
| congestive | I50.9 | Heart failure, unspecified |
| congestive › newborn | P29.0 | Neonatal cardiac failure |
| congestive › rheumatic | I09.81 | Rheumatic heart failure |
| decompensated | I50.9 | Heart failure, unspecified |
| diastolic | I50.30 | Unspecified diastolic (congestive) heart failure |
| diastolic › acute | I50.31 | Acute diastolic (congestive) heart failure |
| diastolic › chronic | I50.32 | Chronic diastolic (congestive) heart failure |
| diastolic › combined with systolic | I50.40 | Unspecified combined systolic (congestive) and diastolic (congestive) heart failure |
| due to presence of cardiac prosthesis | I97.13- | Postprocedural heart failure |
| end stage | I50.84 | End stage heart failure |
| following cardiac surgery | I97.130 | Postprocedural heart failure following cardiac surgery |
| following other surgery | I97.131 | Postprocedural heart failure following other surgery |
| high output NOS | I50.83 | High output heart failure |
| low output NOS | I50.9 | Heart failure, unspecified |
| newborn | P29.0 | Neonatal cardiac failure |
| peripartum | O90.3 | Peripartum cardiomyopathy |
| postprocedural | I97.13- | Postprocedural heart failure |
| rheumatic | I09.9 | Rheumatic heart disease, unspecified |
| right | I50.810 | Right heart failure, unspecified |
| right › acute | I50.811 | Acute right heart failure |
| right › chronic | I50.812 | Chronic right heart failure |
| right › secondary to left heart failure | I50.814 | Right heart failure due to left heart failure |
| specified NEC | I50.89 | Other heart failure |
| stage A | Z91.89 | Other specified personal risk factors, not elsewhere classified |
| stage B | I50.9 | Heart failure, unspecified |
| stage C | I50.9 | Heart failure, unspecified |
| stage D | I50.84 | End stage heart failure |
| systolic | I50.20 | Unspecified systolic (congestive) heart failure |
| systolic › acute | I50.21 | Acute systolic (congestive) heart failure |
| systolic › chronic | I50.22 | Chronic systolic (congestive) heart failure |
| systolic › combined with diastolic | I50.40 | Unspecified combined systolic (congestive) and diastolic (congestive) heart failure |
| thyrotoxic | E05.90 | Thyrotoxicosis, unspecified without thyrotoxic crisis or storm |
What else changes the congestive heart failure code?
Heart failure in a patient with hypertension is coded first to I11.0, Hypertensive heart disease with heart failure, with the I50.- code added to identify the type of heart failure — unless the provider documents that the two are unrelated. With chronic kidney disease as well, category I13 applies.
“Hypertension with one or more heart conditions classified to I50.-, Heart failure, I51.4, Myocarditis, unspecified, I51.89, Other ill-defined heart diseases, or I51.9, Heart disease, unspecified, is assigned to a code from category I11, Hypertensive heart disease.”
“Use additional code(s) from category I50, Heart failure, or I51, Complications and ill-defined descriptions of heart disease, to identify the heart condition.”
What does the Tabular List say about I50.9?
The instructional notes that govern I50.9, including those it inherits from its category and chapter. An Excludes1 note means the two codes are never reported together.
Excludes2 — not included here
The conditions below are not part of I50.9, but a patient may have both at the same time. When documentation supports it, I50.9 and the excluded code may both be reported.
- fluid overload unrelated to congestive heart failure (E87.70)
Inclusion terms
Alternative wording in documentation that is classified to I50.9.
- Cardiac, heart or myocardial failure NOS
- Congestive heart disease
- Congestive heart failure NOS
Code first — inherited from I50
The underlying condition below must be sequenced before I50.9. I50.9 describes a manifestation and cannot be the principal or first-listed diagnosis.
- 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)
Excludes2 — not included here — inherited from Chapter 9
The conditions below are not part of I50.9, but a patient may have both at the same time. When documentation supports it, I50.9 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
- systemic connective tissue disorders (M30-M36)
- transient cerebral ischemic attacks and related syndromes (G45.-)
Excludes2 — not included here — inherited from I50
The conditions below are not part of I50.9, but a patient may have both at the same time. When documentation supports it, I50.9 and the excluded code may both be reported.
Codes, descriptions and Index entries are from the official ICD-10-CM FY2027 release. Guideline text is quoted from the ICD-10-CM Official Guidelines for Coding and Reporting FY 2027. A code must always be verified in the Tabular List before it is reported. Data sources