K51.013

HCC Category Mapping

What This Code Means

A chronic inflammatory condition affecting the entire colon that has created an abnormal tunnel or connection between the colon and another organ or the skin. This is a serious complication of ulcerative colitis.

Coding Tips

• •Document the location and type of fistula (enterocutaneous, rectovaginal, etc.) in the medical record
• •Verify that the fistula is directly attributable to the ulcerative pancolitis and not a separate condition

Clinical Significance

Ulcerative pancolitis with fistula indicates severe transmural disease complication where chronic inflammation has created an abnormal connection between the colon and another organ or the skin. While fistulas are more common in Crohn disease, their occurrence in ulcerative colitis signifies advanced disease and often requires surgical management.

Documentation Requirements

• ✓Confirmed diagnosis of ulcerative colitis with pancolitis via colonoscopy or biopsy
• ✓Documentation of fistula type and location (rectovaginal, enterocutaneous, colovesical, etc.)
• ✓Imaging confirmation of fistula (MRI pelvis, fistulogram, CT scan with contrast)
• ✓Provider statement attributing the fistula to the ulcerative colitis
• ✓Current treatment plan and surgical consultation if applicable
• ✓Assessment of active inflammation and disease severity

Commonly Confused Codes