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ICD-10-CM 2027

ICD-10 code for umbilical region bite

S31.155

Open bite of abdominal wall, periumbilic region without penetration into peritoneal cavity

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Bite (s) (animal) (human) › umbilical region”. Page updated September 29, 2026.

About coding umbilical region bite

The ICD-10-CM code for umbilical region bite is S31.155 (Open bite of abdominal wall, periumbilic region without penetration into peritoneal cavity).

Within S31.15, choose S31.155 (periumbilic region without penetration into peritoneal cavity) only when documentation doesn't support a more specific option: right upper quadrant without penetration into peritoneal cavity (S31.150), left upper quadrant without penetration into peritoneal cavity (S31.151), epigastric region without penetration into peritoneal cavity (S31.152), right lower quadrant without penetration into peritoneal cavity (S31.153), left lower quadrant without penetration into peritoneal cavity (S31.154), right flank without penetration into peritoneal cavity (S31.156), left flank without penetration into peritoneal cavity (S31.157), unspecified quadrant without penetration into peritoneal cavity (S31.159) and 1 more.

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.

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

Common questions about umbilical region bite ICD-10 codes

What is the ICD-10 code for umbilical region bite?

S31.155 — Open bite of abdominal wall, periumbilic region without penetration into peritoneal cavity (a header code; report a more specific subcode).

Is S31.155 billable?

No. S31.155 is a header code. Report one of its more specific subcodes instead.