L03.31Cellulitis of trunk

L03.31 is the ICD-10-CM diagnosis code for cellulitis of trunk. It belongs to category L03 (cellulitis and acute lymphangitis), block L00-L08 (infections of the skin and subcutaneous tissue) and chapter 12 (diseases of the skin and subcutaneous tissue). It is a header code, so it can't be reported by itself; one of its 9 subcodes must be used instead.

Within L03.3 (cellulitis and acute lymphangitis of trunk), L03.31 is specifically for cellulitis of trunk. Related codes cover acute lymphangitis of trunk (L03.32).

To report this condition, pick the subcode that matches the documentation: L03.311 (wall), L03.312 (flank]), L03.313 (wall), L03.314 (groin), L03.315 (perineum), L03.316 (umbilicus), L03.317 (buttock), L03.319 (unspecified) and 1 more.

The conditions in its Excludes2 note aren't part of L03.31, but may be coded alongside it if the patient has both: cellulitis of anal and rectal regions (K61.-), cellulitis of breast NOS (N61.0), cellulitis of female external genital organs (N76.4), cellulitis of male external genital organs (N48.2, N49.-) 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.