S31.603Header code — not billable

Unspecified open wound of abdominal wall, right lower quadrant with penetration into peritoneal cavity

Short description: Unsp opn wnd abd wall, right lower q w penet perit cav

Chapter
19. Injury, poisoning and certain other consequences of external causes
Category
S31
Effective date
October 1, 2026

Related codes in category S31

S31Opn wnd abdomen, lower back, pelvis and external genitalsS31.0Open wound of lower back and pelvisS31.00Unspecified open wound of lower back and pelvisS31.000Unsp opn wnd lower back and pelvis w/o penet retroperitonS31.000AUnsp opn wnd low back and pelv w/o penet retroperiton, initYesS31.000DUnsp opn wnd low back and pelv w/o penet retroperiton, subsYesS31.000SUnsp opn wnd low back and pelv w/o penet retroperiton, sqlaYesS31.001Unsp opn wnd lower back and pelvis w penet retroperitonS31.001AUnsp opn wnd low back and pelvis w penet retroperiton, initYesS31.001DUnsp opn wnd low back and pelvis w penet retroperiton, subsYesS31.001SUnsp opn wnd low back and pelvis w penet retroperiton, sqlaYesS31.01Laceration without foreign body of lower back and pelvis

Frequently asked questions

What is ICD-10 code S31.603?

S31.603 is an ICD-10-CM diagnosis code for Unspecified open wound of abdominal wall, right lower quadrant with penetration into peritoneal cavity.

Is S31.603 a billable code?

No. S31.603 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is S31.603 in?

S31.603 falls under Chapter 19: Injury, poisoning and certain other consequences of external causes.

When did S31.603 become effective?

S31.603 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to S31.603?

S31.603 belongs to category S31, which includes 12 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.