K31
⚠ Non-billable
Other diseases of stomach and duodenum
ICD-10-CM · FY2026 · Diseases of the Digestive System
Code
K31
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Diseases of the Digestive System
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Includes
- functional disorders of stomach
Excludes2 — not included here, but may code together
- diabetic gastroparesis (E08.43, E09.43, E10.43, E11.43, E13.43)
- diverticulum of duodenum (K57.00-K57.13)
Frequently asked questions
What is ICD-10 code K31?
ICD-10-CM code K31 represents Other diseases of stomach and duodenum. It is a non-billable header code requiring a more specific subcategory in the Diseases of the Digestive System chapter, effective October 1, 2025 – September 30, 2026.
Is K31 billable?
No. K31 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is K31 in?
K31 belongs to the Diseases of the Digestive System chapter (K00–K95) of ICD-10-CM.
Related codes in the K31 category
K31.0
Acute dilatation of stomach
Billable
K31.1
Adult hypertrophic pyloric stenosis
Billable
K31.2
Hourglass stricture and stenosis of stomach
Billable
K31.3
Pylorospasm, not elsewhere classified
Billable
K31.4
Gastric diverticulum
Billable
K31.5
Obstruction of duodenum
Billable
K31.6
Fistula of stomach and duodenum
Billable
K31.7
Polyp of stomach and duodenum
Billable
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