ICD10
ICD-10 Code K31.8: Other specified diseases of stomach and duodenum
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the digestive system (K00-K95).
When is it used?
- May be used when a clinician documents other specified diseases of stomach and duodenum in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
Code hierarchy
chapter
11Diseases of the digestive system (K00-K95)
block
K20-K31Diseases of esophagus, stomach and duodenum
category
K31Other diseases of stomach and duodenum
currentK31
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
GastroenterologistGeneral Physician
Related codes
Sibling codes
K31.0Acute dilatation of stomachbillableK31.1Adult hypertrophic pyloric stenosisbillableK31.2Hourglass stricture and stenosis of stomachbillableK31.3Pylorospasm, not elsewhere classifiedbillableK31.4Gastric diverticulumbillableK31.5Obstruction of duodenumbillableK31.6Fistula of stomach and duodenumbillableK31.7Polyp of stomach and duodenumbillableK31.9Disease of stomach and duodenum, unspecifiedbillableK31.AGastric intestinal metaplasia
Mapped diagnoses and classifications
SNOMED_CT 41992006high
Abnormal gastric acidity
Source: SNOMED International ICD-10 map
SNOMED_CT 51318005high
Abnormal gastric secretion
Source: SNOMED International ICD-10 map
SNOMED_CT 4481007high
Abnormal gastric secretion regulation
Source: SNOMED International ICD-10 map
SNOMED_CT 47481007high
Achlorhydria
Source: SNOMED International ICD-10 map
SNOMED_CT 20754004high
Achylia gastrica
Source: SNOMED International ICD-10 map
SNOMED_CT 717871001high
Acquired deformity of duodenum
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
K31.8
Replacement codes
K31.82 — Dieulafoy lesion (hemorrhagic) of stomach and duodenumK31.83 — AchlorhydriaK31.84 — GastroparesisK31.89 — Other diseases of stomach and duodenum
Common synonyms
Other specified diseases of stomach and duodenum
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.