DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

K56 Paralytic ileus and intestinal obstruction without hernia

  • Header · not billable

K56 is not billable. The category heads 16 billable codes in FY2027, grouped under 8 subdivisions.

Index → code

Where it sits

  1. Chapter 11 Diseases of the digestive system (K00-K95)
  2. K55-K64 Other diseases of intestines (K55-K64)
  3. K56 Paralytic ileus and intestinal obstruction without hernia
Billable codes
16
Subdivisions
8
CC / MCC codes
14 / 1
HCC V28 codes
16
New FY2027
0
Index entries
87

Codes in K56

  1. K56.0
    Paralytic ileus
    BillableCC78
    Inclusion terms 3, Excludes1 3

    Inclusion terms

    • Paralysis of bowel
    • Paralysis of colon
    • Paralysis of intestine

    Excludes1

    • gallstone ileus (K56.3) K56.3
    • ileus NOS (K56.7) K56.7
    • obstructive ileus NOS (K56.69-) K56.69
  2. K56.1
    Intussusception
    BillableCC78
    Inclusion terms 4, Excludes2 1

    Inclusion terms

    • Intussusception or invagination of bowel
    • Intussusception or invagination of colon
    • Intussusception or invagination of intestine
    • Intussusception or invagination of rectum

    Excludes2

    • intussusception of appendix (K38.8) K38.8
  3. K56.2
    Volvulus
    BillableMCC78
    Inclusion terms 3, Excludes2 1

    Inclusion terms

    • Strangulation of colon or intestine
    • Torsion of colon or intestine
    • Twist of colon or intestine

    Excludes2

    • volvulus of duodenum (K31.5) K31.5
  4. K56.3
    Gallstone ileus
    BillableCC78
    Inclusion terms 1

    Inclusion terms

    • Obstruction of intestine by gallstone
  5. K56.4
    Other impaction of intestine
    Header
  6. K56.41
    Fecal impaction
    Billable78
    Excludes2 1

    Excludes2

    • incomplete defecation (R15.0) R15.0
  7. K56.49
    Other impaction of intestine
    BillableCC78
  8. K56.5
    Intestinal adhesions [bands] with obstruction (postinfection)
    Header
    Inclusion terms 2

    Inclusion terms

    • Abdominal hernia due to adhesions with obstruction
    • Peritoneal adhesions [bands] with intestinal obstruction (postinfection)
  9. K56.50
    Intestinal adhesions [bands], unspecified as to partial versus complete obstruction
    BillableCC78
    Inclusion terms 1

    Inclusion terms

    • Intestinal adhesions with obstruction NOS
  10. K56.51
    Intestinal adhesions [bands], with partial obstruction
    BillableCC78
    Inclusion terms 1

    Inclusion terms

    • Intestinal adhesions with incomplete obstruction
  11. K56.52
    Intestinal adhesions [bands] with complete obstruction
    BillableCC78
  12. K56.6
    Other and unspecified intestinal obstruction
    Header
  13. K56.60
    Unspecified intestinal obstruction
    Header
  14. K56.600
    Partial intestinal obstruction, unspecified as to cause
    BillableCC78
    Inclusion terms 1

    Inclusion terms

    • Incomplete intestinal obstruction, NOS
  15. K56.601
    Complete intestinal obstruction, unspecified as to cause
    BillableCC78
  16. K56.609
    Unspecified intestinal obstruction, unspecified as to partial versus complete obstruction
    BillableCC78
    Inclusion terms 1

    Inclusion terms

    • Intestinal obstruction NOS
  17. K56.69
    Other intestinal obstruction
    Header
    Inclusion terms 5

    Inclusion terms

    • Enterostenosis NOS
    • Obstructive ileus NOS
    • Occlusion of colon or intestine NOS
    • Stenosis of colon or intestine NOS
    • Stricture of colon or intestine NOS
  18. K56.690
    Other partial intestinal obstruction
    BillableCC78
    Inclusion terms 1

    Inclusion terms

    • Other incomplete intestinal obstruction
  19. K56.691
    Other complete intestinal obstruction
    BillableCC78
  20. K56.699
    Other intestinal obstruction unspecified as to partial versus complete obstruction
    BillableCC78
    Inclusion terms 1

    Inclusion terms

    • Other intestinal obstruction, NEC
  21. K56.7
    Ileus, unspecified
    BillableCC78
    Excludes1 1, Excludes2 1

    Excludes1

    • obstructive ileus (K56.69-) K56.69

    Excludes2

    • intestinal obstruction with hernia (K40-K46) K40 K46

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At K56

Excludes1

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

Excludes2

  • stenosis of anus or rectum (K62.4) K62.4

Notes that also apply

Chapter 11 instructions (Excludes2 8): printed on the chapter 11 page.

Index entries

  • Intussusception (bowel) (colon) (enteric) (ileocecal) (ileocolic) (intestine) ( rectum) → K56.1
  • Invagination (bowel, colon, intestine or rectum) → K56.1
  • Telescoped bowel or intestine → K56.1
  • Volvulus (bowel) (colon) (intestine) → K56.2
  • Fecalith (impaction) → K56.41
  • Stercolith (impaction) → K56.41
  • Enterostenosis → K56.699
  • Ileus (bowel) (colon) (inhibitory) (intestine) → K56.7
  • Ileus (bowel) (colon) (inhibitory) (intestine)adynamic → K56.0
  • Ileus (bowel) (colon) (inhibitory) (intestine)neurogenic → K56.0
  • Ileus (bowel) (colon) (inhibitory) (intestine)paralytic → K56.0
  • Paralysis, paralytic (complete) (incomplete)bowel, colon or intestine → K56.0
  • Paralysis, paralytic (complete) (incomplete)colon → K56.0
  • Paralysis, paralytic (complete) (incomplete)ileus → K56.0
  • Paralysis, paralytic (complete) (incomplete)intestine → K56.0
  • Paresisbowel, colon or intestine → K56.0
  • Knot(s)intestinal, syndrome (volvulus) → K56.2
  • Knotting (of)intestine → K56.2
  • Strangulation, strangulatedbowel or colon → K56.2
  • Strangulation, strangulatedintestine (large) (small) → K56.2
  • Strangulation, strangulatedmesentery → K56.2
  • Strangulation, strangulatedomentum → K56.2
  • Torsionbowel, colon or intestine → K56.2
  • Torsionmesentery → K56.2
  • Torsionomentum → K56.2
  • Twist, twistedbowel, colon or intestine → K56.2
  • Twist, twistedmesentery → K56.2
  • Twist, twistedomentum → K56.2
  • Volvulus (bowel) (colon) (intestine)with perforation → K56.2
  • Gallstone (colic) (cystic duct) (gallbladder) (impacted) (multiple)causing intestinal obstruction → K56.3
  • Ileus (bowel) (colon) (inhibitory) (intestine)due to gallstone (in intestine) → K56.3
  • Ileus (bowel) (colon) (inhibitory) (intestine)gallstone → K56.3
  • Impaction, impactedfecal, feces → K56.41
  • Obstruction, obstructed, obstructivefecal → K56.41
  • Calculus, calculi, calculousintestinal (impaction) (obstruction) → K56.49
  • Impaction, impactedbowel, colon, rectum → K56.49
  • Impaction, impactedintestine (calculous) NEC → K56.49
  • Adhesions, adhesive (postinfective)with intestinal obstruction → K56.50
  • Hernia, hernial (acquired) (recurrent)due to adhesions (with obstruction) → K56.50
  • Obstruction, obstructed, obstructiveintestine → K56.609

47 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy