10ICD Code Hub

K51.31

Header — not billable

Ulcerative (chronic) rectosigmoiditis with complications

The ICD-10 code for ulcerative (chronic) rectosigmoiditis with complications is K51.31.

K51.31 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 6 more specific codes below.

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

Child codes under K51.31

Related codes in this category