Skip to content
Dx

ICD-10-CM 2027 diagnosis code

I50Heart failure

Not billable — use a more specific code

I50 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About I50

I50 is the ICD-10-CM diagnosis code for heart failure. It belongs to block I30-I5A (other forms of heart disease) and chapter 9 (diseases of the circulatory system). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: I50.1 (unspecified), I50.2 (failure), I50.3 (failure), I50.4 (failure), I50.8 (failure) and I50.9 (unspecified).

The conditions in its Excludes2 note aren't part of I50, but may be coded alongside it if the patient has both: cardiac arrest (I46.-) and 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-) and 2 more.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under I50

Coding notes

Excludes2Not included here — may be reported together if both conditions exist
  • cardiac arrest (I46.-)
  • neonatal cardiac failure (P29.0)
Code firstSequence the underlying condition 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)

Notes that apply from higher levels

Instructions written at a parent level also apply to I50.

Broader instructions also apply from Chapter 9: Diseases of the circulatory system.

Codes whose notes reference I50

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about I50

Is I50 billable?

No. I50 is a header code. Report one of its more specific subcodes instead.