T31.80Burns involving 80-89% of body surface with 0% to 9% third degree burns

T31.80 is the ICD-10-CM diagnosis code for burns involving 80-89% of body surface with 0% to 9% third degree burns. 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 billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within T31.8 (burns involving 80-89% of body surface), T31.80 is specifically for burns involving 80-89% of body surface with 0% to 9% third degree burns. Related codes cover with 10-19% third degree burns (T31.81), with 20-29% third degree burns (T31.82), with 30-39% third degree burns (T31.83), with 40-49% third degree burns (T31.84), with 50-59% third degree burns (T31.85), with 60-69% third degree burns (T31.86), with 70-79% third degree burns (T31.87) and with 80-89% third degree burns (T31.88).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 935 (Non-Extensive Burns, relative weight 2.4243), in MDC 22 (Burns), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

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

Before ICD-10, this condition was coded in ICD-9-CM as 948.80 (burn [any degree] involving 80-89 percent of body surface with third degree burn, less than 10 percent or unspecified).