K56.3 Gallstone ileus

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

Applicable to

• Obstruction of intestine by gallstone

Applies from K56 Paralytic ileus and intestinal obstruction without hernia

Excludes1 (never code together)

• congenital stricture or stenosis of intestine (Q41-Q42)
• cystic fibrosis with meconium ileus (E84.11)
• ischemic stricture of intestine (K55.1)
• meconium ileus NOS (P76.0)
• neonatal intestinal obstructions classifiable to P76.-
• obstruction of duodenum (K31.5)
• postprocedural intestinal obstruction (K91.3-)

Excludes2 (not included here)

• stenosis of anus or rectum (K62.4)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 78 — Intestinal Obstruction/Perforation
• CMS-HCC V22: HCC 33 — Intestinal Obstruction/Perforation
• ESRD V24: HCC 33

MS-DRG index

Defines the logic of DRG(s) 388-390 in MDC 06.

Approximate ICD-9-CM (GEMs)

• 560.31 Gallstone ileus

Code annotations containing back-references to K56.3

Back-references to K56.3

• Type 1 Excludes: K56.0 Paralytic ileus ("gallstone ileus (K56.3)")

Back-references to K56

• Type 1 Excludes: P76.8 Other specified intestinal obstruction of newborn ("intestinal obstruction classifiable to K56.-")

Diagnosis Index entries for K56.3

• Gallstone (colic) (cystic duct) (gallbladder) (impacted) (multiple) › causing intestinal obstruction
• Ileus (bowel) (colon) (inhibitory) (intestine) › due to gallstone (in intestine)
• Ileus (bowel) (colon) (inhibitory) (intestine) › gallstone
• Impaction, impacted › bowel, colon, rectum › by gallstone
• Impaction, impacted › gallstone (s) › in intestine, with obstruction (any part)
• Impaction, impacted › intestine (calculous) NEC › gallstone, with ileus
• Obstruction, obstructed, obstructive › intestine › by gallstone

Nearby codes

• K56 Paralytic ileus and intestinal obstruction without hernia
• K56.0 Paralytic ileus
• K56.1 Intussusception
• K56.2 Volvulus
• K56.3 Gallstone ileus (this code)
• K56.4 Other impaction of intestine
• K56.41 Fecal impaction
• K56.49 Other impaction of intestine
• K56.5 Intestinal adhesions [bands] with obstruction (postinfection)
• K56.50 Intestinal adhesions [bands], unspecified as to partial versus complete obstruction