K31.9
BillableDisease of stomach and duodenum, unspecified
Disease of stomach and duodenum, unspecified
Coding Notes
Includes
Conditions included under this code
- functional disorders of stomach
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •hiatus herniaK44
- •diabetic gastroparesis, , , ,E08.43, E09.43, E10.43, E11.43, E13.43
- •diverticulum of duodenumK57.00-K57.13
Related Codes(10)
K31.0Acute dilatation of stomach
K31.1Adult hypertrophic pyloric stenosis
K31.2Hourglass stricture and stenosis of stomach
K31.3Pylorospasm, not elsewhere classified
K31.4Gastric diverticulum
K31.5Obstruction of duodenum
K31.6Fistula of stomach and duodenum
K31.7Polyp of stomach and duodenum
K31.8Other specified diseases of stomach and duodenum
K31.AGastric intestinal metaplasia
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(49)
SNOMED CT
- Gastric dysplasia20915006
- Stomach dysplasia20915006
- Disorder of stomach29384001
- Gastropathy29384001
- Disorder of duodenum52182008
- Duodenal disease52182008
- Drug-induced gastritis52305004
- Gastritis medicamentosa52305004
- NSAID-associated gastropathy62473009
- Non-steroidal anti-inflammatory drug-associated gastropathy62473009
- Nonsteroidal anti-inflammatory drug-associated gastropathy62473009
- Lesion of stomach300296006
- Stomach problem300306001
- Mild stomach dysplasia308853007
- Moderate stomach dysplasia308855000
- Severe stomach dysplasia308856004
- Reactive gastropathy399379004
- Erosive duodenopathy413211007
- Erosive gastropathy413216002
- Hypertrophic gastropathy413219009
- Papulous gastropathy413220003
- Gastric mucosal lesion879977008
- Lesion of gastric mucosa879977008
- Gastroduodenal disorder3411000119107
Clinical Terms
- Papulous gastropathy
- Hypertrophic gastropathy
- Gastropathy
- Reactive gastropathy
- Disorder of duodenum
- Lesion of stomach
- Stomach dysplasia
- Gastritis medicamentosa
- Moderate stomach dysplasia
- Gastric mucosal lesion
- Nonsteroidal anti-inflammatory drug-associated gastropathy
- Disorder of stomach
- Gastric dysplasia
- Stomach problem
- Lesion of gastric mucosa
- NSAID-associated gastropathy
- Severe stomach dysplasia
- Non-steroidal anti-inflammatory drug-associated gastropathy
- Drug-induced gastritis
- Duodenal disease
- Erosive duodenopathy
- Mild stomach dysplasia
- Erosive gastropathy
- Gastroduodenal disorder
Frequently Asked Questions
What is the ICD-10 code for disease of stomach and duodenum, unspecified?
The ICD-10-CM code for disease of stomach and duodenum, unspecified is K31.9. The full clinical description is "Disease of stomach and duodenum, unspecified". K31.9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code K31.9 mean?
ICD-10-CM code K31.9 represents “Disease of stomach and duodenum, unspecified”. It is classified under Chapter 11: Diseases of the Digestive System and is a billable/specific code that can be used on a claim.
Is K31.9 a billable code?
Yes, K31.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is K31.9 in?
K31.9 is in Chapter 11: Diseases of the Digestive System (codes K00-K95).
What SNOMED CT codes does K31.9 map to?
K31.9 maps to 17 SNOMED CT concepts: 52182008, 29384001, 52305004, 413211007, 413216002, and 12 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for K31.9?
K31.9 is linked to 1 UMLS Concept Unique Identifier: C0494741. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does K31.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like disease of stomach and duodenum, unspecified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of K31.9?
K31.9 maps to the ICD-11 code: DA7Z (Diseases of the stomach or the duodenum, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.