K56.601 Complete intestinal obstruction, unspecified as to cause

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

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)

• 560.9 Unspecified intestinal obstruction (approximate)

Code annotations containing back-references to K56.601

Back-references to K56

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

Diagnosis Index entries for K56.601

• Obstruction, obstructed, obstructive › intestine › complete

Nearby codes

• K56.51 Intestinal adhesions [bands], with partial obstruction
• K56.52 Intestinal adhesions [bands] with complete obstruction
• K56.6 Other and unspecified intestinal obstruction
• K56.60 Unspecified intestinal obstruction
• K56.600 Partial intestinal obstruction, unspecified as to cause
• K56.601 Complete intestinal obstruction, unspecified as to cause (this code)
• K56.609 Unspecified intestinal obstruction, unspecified as to partial versus complete obstruction
• K56.69 Other intestinal obstruction
• K56.690 Other partial intestinal obstruction
• K56.691 Other complete intestinal obstruction
• K56.699 Other intestinal obstruction unspecified as to partial versus complete obstruction