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K59.3 Megacolon, not elsewhere classified
BackK59Other functional intestinal disordersCategory7 →K59.0ConstipationCategory6 →K59.00Constipation, unspecifiedCategoryK59.01Slow transit constipationCategoryK59.02Outlet dysfunction constipationCategoryK59.03Drug induced constipationCategoryK59.04Chronic idiopathic constipationCategoryK59.09Other constipationCategoryK59.1Functional diarrheaCategoryK59.2Neurogenic bowel, not elsewhere classifiedCategoryK59.3Megacolon, not elsewhere classifiedCategory2 →K59.31Toxic megacolonCategoryK59.39Other megacolonCategoryK59.4Anal spasmCategoryK59.8Other specified functional intestinal disordersCategory2 →K59.81Ogilvie syndromeCategoryK59.89Other specified functional intestinal disordersCategoryK59.9Functional intestinal disorder, unspecifiedCategory
Category
K59.3
Megacolon, not elsewhere classified
EXAMPLES
Dilatation of colon
EXCLUDES
Excludes1: congenital megacolon (aganglionic) (Q43.1)
megacolon (due to) (in) Chagas' disease (B57.32)
megacolon (due to) (in) Clostridium difficile (A04.7-)
megacolon (due to) (in) Hirschsprung's disease (Q43.1)
megacolon (due to) (in) Chagas' disease (B57.32)
megacolon (due to) (in) Clostridium difficile (A04.7-)
megacolon (due to) (in) Hirschsprung's disease (Q43.1)
CODING RULE
Code first: , if applicable (T51-T65) to identify toxic agent
- Chapter
- XI · Diseases of the digestive system
- Section
- K55-K64
- Valid from
Source
CMS ICD-10-CM Tabular List, edition FY2026.