ICD-10 Code K51.219 – Ulcerative (chronic) proctitis with unspecified complications (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K51.219 – Ulcerative (chronic) proctitis with unspecified complications
What it is
This code identifies chronic ulcerative inflammation limited to the rectum, with a complication documented but not specified. Use it when the record clearly states ulcerative proctitis and an unspecified complication.
Clinical signs
Typical findings include rectal bleeding, urgency, tenesmus, and mucus passage. Clinical features vary; refer to documentation, especially when the complication is not described in detail.
When to use this code
Use K51.219 when the provider documents chronic ulcerative proctitis and notes a complication without naming it. It also fits follow-up visits when the same diagnosis remains active and the complication is still unspecified. If the record says only proctitis, check documentation before coding.
Do not use for
Do not use this code for ulcerative colitis involving the colon more broadly, or for acute proctitis without a chronic ulcerative diagnosis. Check documentation if the complication is actually specified elsewhere.
Coding tip
Assign the unspecified-complication code only when the chart supports both chronic ulcerative proctitis and a complication that is not named.