AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2016 Issue 4; ICD-10-CM NEW/REVISED CODES

Megacolon

Codes K59.31, Toxic megacolon, and K59.39, Other megacolon, have been created for megacolon. Megacolon is a significant dilation of the colon. Toxic megacolon is the rapid nonobstructive dilation of the colon with infection or inflammation. Various forms of colitis such as ulcerative colitis, Crohn’s colitis, infectious colitis, ischemic colitis, radiation colitis and colitis associated with chemotherapy, and medications that affect motility of the bowel can all cause megacolon. The dilation may be segmental or include the entire colon. As nitric oxide increases and inhibits smooth muscle tone, inflammation progresses from the mucosa into smooth muscle layers...

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