S31.1Open wound of abdominal wall without penetration into peritoneal cavity

S31.1 is the ICD-10-CM diagnosis code for open wound of abdominal wall without penetration into peritoneal cavity. It belongs to category S31 (open wound of abdomen, lower back, pelvis and external genitals), block S30-S39 (injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals) 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 6 subcodes must be used instead.

Within S31, choose S31.1 (abdominal wall without penetration into peritoneal cavity) only when documentation doesn't support a more specific option: lower back and pelvis (S31.0), penis (S31.2), scrotum and testes (S31.3), vagina and vulva (S31.4), unspecified external genital organs (S31.5), abdominal wall with penetration into peritoneal cavity (S31.6) and other parts of abdomen, lower back and pelvis (S31.8).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

The conditions in its Excludes2 note aren't part of S31.1, but may be coded alongside it if the patient has both: open wound of abdominal wall with penetration into peritoneal cavity (S31.6-).

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