K31

Non-billable

Other diseases of stomach and duodenum

K31 is the ICD-10-CM code for Other diseases of stomach and duodenum. It is a non-billable category code — use a more specific child code such as K31.0 for billing.

Status
Header (non-billable)
Chapter
K00-K95
Subcodes
11
Edition
FY2026

K00-K95 Diseases of the digestive system

Includes

  • functional disorders of stomach

Excludes2 — not included here

Frequently asked questions

What is ICD-10 code K31?
K31 is the ICD-10-CM code for "Other diseases of stomach and duodenum". It falls under K00-K95 Diseases of the digestive system.
Is K31 a billable code?
No — K31 is a non-billable header code. Use a more specific child code (such as K31.0) for billing.
What are the subcodes of K31?
K31 has 11 more specific child codes, including K31.0, K31.1, K31.2.

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

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