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K59

Non-billable

Other functional intestinal disorders

K59 is the ICD-10-CM code for Other functional intestinal disorders. It is a non-billable category code — use a more specific child code such as K59.0 for billing.

Status
Header (non-billable)
Chapter
K00-K95
Subcodes
7
Edition
FY2026

K00-K95 Diseases of the digestive system

Excludes1 — not coded here

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

Excludes2 — not included here

  • •functional disorders of stomach (K31.-)

Frequently asked questions

What is ICD-10 code K59?
K59 is the ICD-10-CM code for "Other functional intestinal disorders". It falls under K00-K95 Diseases of the digestive system.
Is K59 a billable code?
No — K59 is a non-billable header code. Use a more specific child code (such as K59.0) for billing.
What are the subcodes of K59?
K59 has 7 more specific child codes, including K59.0, K59.1, K59.2.
What is excluded from K59?
Excludes1 (not coded here): change in bowel habit NOS (R19.4); intestinal malabsorption (K90.-); psychogenic intestinal disorders (F45.8).

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

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