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K59.39

K59.39: Other megacolon

Billable / specific codeICD-10-CM

K59.39 is a billable, specific ICD-10-CM code for other megacolon. It is valid for submission on a claim.

Check K59.39 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Megacolon NOS

Excludes1 inherited from the categories above K59.39

A category’s note binds every code beneath it.

Written on K59.3: Megacolon, not elsewhere classified

  • 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)

Written on K59: Other functional intestinal disorders

  • change in bowel habit NOS (R19.4)
  • intestinal malabsorption (K90.-)
  • psychogenic intestinal disorders (F45.8)

Excludes2 inherited from the categories above K59.39

Not part of this code, but both may be coded when both are present.

Written on K59: Other functional intestinal disorders

  • functional disorders of stomach (K31.-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

K59.39 is named in 6 Medicare coverage policies: 6 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A55937Billing and Coding: Diagnostic Colonoscopy
  • A56394Billing and Coding: Colonoscopy and Sigmoidoscopy-Diagnostic
  • A56421Billing and Coding: CT of the Abdomen and Pelvis
  • A56456Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy

Alphabetic index entries that lead here

  • Macrosigmoid
  • Megacolon(acquired) (functional) (not Hirschsprung's disease) (in)
  • Megasigmoid
  • Dilatation›colon
  • Dilatation›rectum
  • Syndrome›faulty bowel habit
  • Excess, excessive, excessively›large›colon

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under K59.3

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.