K31.89 Other diseases of stomach and duodenum

Billable ICD-10-CM code, FY2026.

Applies from K31 Other diseases of stomach and duodenum

Includes

• functional disorders of stomach

Excludes2 (not included here)

• diabetic gastroparesis (E08.43, E09.43, E10.43, E11.43, E13.43)
• diverticulum of duodenum (K57.00-K57.13)

MS-DRG index

Defines the logic of DRG(s) 391-392 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 537.5 Gastroptosis (approximate)
• 537.89 Other specified disorders of stomach and duodenum (approximate)

Code annotations containing back-references to K31.89

Back-references to K31.89

• Type 1 Excludes: K31.2 Hourglass stricture and stenosis of stomach ("hourglass contraction of stomach (K31.89)")
• Use Additional: K76.6 Portal hypertension ("portal hypertensive gastropathy (K31.89)")

Back-references to K31

• Type 2 Excludes: K59 Other functional intestinal disorders ("functional disorders of stomach (K31.-)")

Diagnosis Index entries for K31.89

• Achylia gastrica
• Atonia, atony, atonic › stomach
• Calculus, calculi, calculous › stomach
• Congestion, congestive › duodenum
• Congestion, congestive › stomach
• Contraction (s), contracture, contracted › hourglass › stomach
• Contraction (s), contracture, contracted › stomach
• Contraction (s), contracture, contracted › stomach › hourglass
• Deformity › duodenal bulb
• Deformity › duodenum (congenital) › acquired
• Deformity › pylorus (congenital) › acquired
• Deformity › stomach (congenital) › acquired
• Degeneration, degenerative › stomach
• Dilatation › stomach
• Disease, diseased › duodenum › specified NEC
• Disease, diseased › Rossbach's (hyperchlorhydria)
• Disease, diseased › stomach › specified NEC
• Distension, distention › stomach
• Dysfunction › stomach
• Engorgement › stomach
• Fish hook stomach
• Gastroliths
• Gastromalacia
• Gastropathy › congestive portal (see also, Hypertension, portal)
• Gastropathy › portal hypertensive (see also, Hypertension, portal)
• Gastropathy › specified NEC
• Gastroptosis
• Gastrospasm (neurogenic) (reflex)
• Gastrostenosis
• Gastrosuccorrhea (continuous) (intermittent)
• Hourglass (contracture) › stomach
• Hyperacidity (gastric)
• Hyperactive, hyperactivity › gastrointestinal
• Hyperactive, hyperactivity › stomach
• Hyperchlorhydria
• Hyperemia (acute) (passive) › stomach
• Hypermobility, hypermotility › stomach
• Hypersecretion › gastric
• Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) › portal (due to chronic liver disease) (idiopathic) › gastropathy
• Hypertony, hypertonia, hypertonicity › stomach
• Hypertrophy, hypertrophic › duodenum
• Hypertrophy, hypertrophic › stomach
• Hypoacidity, gastric
• Hypochlorhydria
• Hypomotility › gastrointestinal (tract)
• Hypomotility › stomach
• Indigestion (acid) (bilious) (functional) › catarrhal
• Inertia › stomach
• Insufficiency, insufficient › pyloric
• Irritable, irritability › stomach

Nearby codes

• K31.811 Angiodysplasia of stomach and duodenum with bleeding
• K31.819 Angiodysplasia of stomach and duodenum without bleeding
• K31.82 Dieulafoy lesion (hemorrhagic) of stomach and duodenum
• K31.83 Achlorhydria
• K31.84 Gastroparesis
• K31.89 Other diseases of stomach and duodenum (this code)
• K31.9 Disease of stomach and duodenum, unspecified
• K31.A Gastric intestinal metaplasia
• K31.A0 Gastric intestinal metaplasia, unspecified
• K31.A1 Gastric intestinal metaplasia without dysplasia
• K31.A11 Gastric intestinal metaplasia without dysplasia, involving the antrum