K59.3

ICD-10Non-billable category

Megacolon, not elsewhere classified

Official ICD-10-CM descriptor (FY2026)

Megacolon, not elsewhere classified

K59.3 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Inclusion terms

  • Dilatation of colon

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

  • 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)

Code first

Sequence the underlying condition before this code.

  • , if applicable (T51-T65) to identify toxic agent

ICD-10-CM FY2026 defines 2 codes beneath K59.3. See the ICD-10-CM index for what this site publishes.

Related codes in K59

Where this code sits

Parent code
K59

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

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