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K59.3

Non-billable

Megacolon, not elsewhere classified

K59.3 is the ICD-10-CM code for Megacolon, not elsewhere classified. It is a non-billable category code — use a more specific child code such as K59.31 for billing.

Status
Header (non-billable)
Chapter
K00-K95
Parent
K59
Subcodes
2
Edition
FY2026

K00-K95 Diseases of the digestive system

Includes

  • •Dilatation of colon

Excludes1 — not coded here

  • •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

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

Frequently asked questions

What is ICD-10 code K59.3?
K59.3 is the ICD-10-CM code for "Megacolon, not elsewhere classified". It falls under K00-K95 Diseases of the digestive system.
Is K59.3 a billable code?
No — K59.3 is a non-billable header code. Use a more specific child code (such as K59.31) for billing.
What are the subcodes of K59.3?
K59.3 has 2 more specific child codes, including K59.31, K59.39.
What is excluded from K59.3?
Excludes1 (not coded here): 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).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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