ICD-10-CM 2027 diagnosis code
T31.9Burns involving 90% or more of body surface
T31.9 is a header code, so it can't be reported by itself. Choose one of the 10 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 T31.9
T31.9 is the ICD-10-CM diagnosis code for burns involving 90% or more of body surface. It belongs to category T31 (burns classified according to extent of body surface involved), block T30-T32 (burns and corrosions of multiple and unspecified body regions) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 10 subcodes must be used instead.
Within T31 (burns classified according to extent of body surface involved), T31.9 is specifically for burns involving 90% or more of body surface. Related codes cover less than 10% of body surface (T31.0), 10-19% of body surface (T31.1), 20-29% of body surface (T31.2), 30-39% of body surface (T31.3), 40-49% of body surface (T31.4), 50-59% of body surface (T31.5), 60-69% of body surface (T31.6), 70-79% of body surface (T31.7) and 1 more.
To report this condition, pick the subcode that matches the documentation: T31.90 (with 0% to 9% third degree burns), T31.91 (with 10-19% third degree burns), T31.92 (with 20-29% third degree burns), T31.93 (with 30-39% third degree burns), T31.94 (with 40-49% third degree burns), T31.95 (with 50-59% third degree burns), T31.96 (with 60-69% third degree burns), T31.97 (with 70-79% third degree burns) 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 T31.9
- T31.90Burns involving 90% or more of body surface with 0% to 9% third degree burnsBillable
- T31.91Burns involving 90% or more of body surface with 10-19% third degree burnsBillable
- T31.92Burns involving 90% or more of body surface with 20-29% third degree burnsBillable
- T31.93Burns involving 90% or more of body surface with 30-39% third degree burnsBillable
- T31.94Burns involving 90% or more of body surface with 40-49% third degree burnsBillable
- T31.95Burns involving 90% or more of body surface with 50-59% third degree burnsBillable
- T31.96Burns involving 90% or more of body surface with 60-69% third degree burnsBillable
- T31.97Burns involving 90% or more of body surface with 70-79% third degree burnsBillable
- T31.98Burns involving 90% or more of body surface with 80-89% third degree burnsBillable
- T31.99Burns involving 90% or more of body surface with 90% or more third degree burnsBillable
Notes that apply from higher levels
Instructions written at a parent level also apply to T31.9.
Broader instructions also apply from Chapter 19: Injury, poisoning and certain other consequences of external causes.
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 T31.9
Is T31.9 billable?
- No. T31.9 is a header code. Report one of its more specific subcodes instead.