K31.5 Obstruction of duodenum

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applicable to

• Constriction of duodenum
• Duodenal ileus (chronic)
• Stenosis of duodenum
• Stricture of duodenum
• Volvulus of duodenum

Excludes1 (never code together)

• congenital stenosis of duodenum (Q41.0)

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) 380-382 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 537.2 Chronic duodenal ileus (approximate)
• 537.3 Other obstruction of duodenum (approximate)

Code annotations containing back-references to K31.5

Back-references to K31.5

• Type 1 Excludes: K56 Paralytic ileus and intestinal obstruction without hernia ("obstruction of duodenum (K31.5)")
• Type 2 Excludes: K56.2 Volvulus ("volvulus of duodenum (K31.5)")

Back-references to K31

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

Diagnosis Index entries for K31.5

• Cicatrix (adherent) (contracted) (painful) (vicious) › duodenum (bulb), obstructive
• Constriction › duodenum
• Ileus (bowel) (colon) (inhibitory) (intestine) › duodenal (chronic)
• Obstruction, obstructed, obstructive › duodenum
• Scar, scarring › duodenum, obstructive
• Stasis › duodenal
• Stenosis, stenotic (cicatricial) › duodenum
• Stricture › duodenum
• Syndrome › aortomesenteric duodenum occlusion
• Volvulus (bowel) (colon) (intestine) › duodenum

Nearby codes

• K31.0 Acute dilatation of stomach
• K31.1 Adult hypertrophic pyloric stenosis
• K31.2 Hourglass stricture and stenosis of stomach
• K31.3 Pylorospasm, not elsewhere classified
• K31.4 Gastric diverticulum
• K31.5 Obstruction of duodenum (this code)
• K31.6 Fistula of stomach and duodenum
• K31.7 Polyp of stomach and duodenum
• K31.8 Other specified diseases of stomach and duodenum
• K31.81 Angiodysplasia of stomach and duodenum
• K31.811 Angiodysplasia of stomach and duodenum with bleeding