T31.4Burns involving 40-49% of body surface

T31.4 is the ICD-10-CM diagnosis code for burns involving 40-49% 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 5 subcodes must be used instead.

Within T31 (burns classified according to extent of body surface involved), T31.4 is specifically for burns involving 40-49% 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), 50-59% of body surface (T31.5), 60-69% of body surface (T31.6), 70-79% of body surface (T31.7), 80-89% of body surface (T31.8) and 1 more.

To report this condition, pick the subcode that matches the documentation: T31.40 (with 0% to 9% third degree burns), T31.41 (with 10-19% third degree burns), T31.42 (with 20-29% third degree burns), T31.43 (with 30-39% third degree burns) and T31.44 (with 40-49% third degree burns).

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