ICD-10-CM 2027 diagnosis code
I05Rheumatic mitral valve diseases
I05 is a header code, so it can't be reported by itself. Choose one of the 5 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 I05
I05 is the ICD-10-CM diagnosis code for rheumatic mitral valve diseases. It belongs to block I05-I09 (chronic rheumatic heart diseases) and chapter 9 (diseases of the circulatory system). It is a header code, so it can't be reported by itself; one of its 5 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: I05.0 (stenosis), I05.1 (insufficiency), I05.2 (insufficiency), I05.8 (diseases) and I05.9 (unspecified).
Don't report I05 together with the conditions in its Excludes1 note: mitral valve disease specified as nonrheumatic (I34.-) and mitral valve disease with aortic and/or tricuspid valve involvement (I08.-).
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 I05
Coding notes
Notes that apply from higher levels
Instructions written at a parent level also apply to I05.
Broader instructions also apply from Chapter 9: Diseases of the circulatory system.
Codes whose notes reference I05
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about I05
Is I05 billable?
- No. I05 is a header code. Report one of its more specific subcodes instead.