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K31.8

Non-billable

Other specified diseases of stomach and duodenum

K31.8 is the ICD-10-CM code for Other specified diseases of stomach and duodenum. It is a non-billable category code — use a more specific child code such as K31.81 for billing.

Status
Header (non-billable)
Chapter
K00-K95
Parent
K31
Subcodes
5
Edition
FY2026

K00-K95 Diseases of the digestive system

What this means — in plain language

MedlinePlus · NIH

Your stomach is an organ between your esophagus and small intestine. It is where digestion of protein begins. The stomach has three tasks. It stores swallowed food. It mixes the food with stomach acids. Then it sends the mixture on to the small intestine. Most people have a problem with their stomach at one time or another. Indigestion and heartburn are common problems. You can relieve some stomach problems with…

Read more about Stomach Disorders at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code K31.8?
K31.8 is the ICD-10-CM code for "Other specified diseases of stomach and duodenum". It falls under K00-K95 Diseases of the digestive system.
Is K31.8 a billable code?
No — K31.8 is a non-billable header code. Use a more specific child code (such as K31.81) for billing.
What are the subcodes of K31.8?
K31.8 has 5 more specific child codes, including K31.81, K31.82, K31.83.

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

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