DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

K91 Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified

  • Header · not billable

K91 is not billable. The category heads 24 billable codes in FY2027, grouped under 8 subdivisions.

Index → code

  • Pouchitis → K91.850
  • Tachyalimentation → K91.2
  • Postcholecystectomy syndrome → K91.5

Where it sits

  1. Chapter 11 Diseases of the digestive system (K00-K95)
  2. K90-K95 Other diseases of the digestive system (K90-K95)
  3. K91 Intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified
Billable codes
24
Subdivisions
8
CC / MCC codes
21 / 0
HCC V28 codes
2
New FY2027
0
Index entries
78

Codes in K91

  1. K91.0
    Vomiting following gastrointestinal surgery
    Billable
  2. K91.1
    Postgastric surgery syndromes
    Billable
    Inclusion terms 3

    Inclusion terms

    • Dumping syndrome
    • Postgastrectomy syndrome
    • Postvagotomy syndrome
  3. K91.2
    Postsurgical malabsorption, not elsewhere classified
    BillableCC
    Inclusion terms 1, Excludes1 2

    Inclusion terms

    • Postsurgical blind loop syndrome

    Excludes1

    • malabsorption osteomalacia in adults (M83.2) M83.2
    • malabsorption osteoporosis, postsurgical (M80.8-, M81.8) M80.8 M81.8
  4. K91.3
    Postprocedural intestinal obstruction
    Header
  5. K91.30
    Postprocedural intestinal obstruction, unspecified as to partial versus complete
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Postprocedural intestinal obstruction NOS
  6. K91.31
    Postprocedural partial intestinal obstruction
    BillableCC
    Inclusion terms 1

    Inclusion terms

    • Postprocedural incomplete intestinal obstruction
  7. K91.32
    Postprocedural complete intestinal obstruction
    BillableCC
  8. K91.5
    Postcholecystectomy syndrome
    Billable
  9. K91.6
    Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating a procedure
    Header
    Excludes1 1

    Excludes1

    • intraoperative hemorrhage and hematoma of a digestive system organ or structure due to accidental puncture and laceration during a procedure (K91.7-) K91.7
  10. K91.61
    Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating a digestive system procedure
    BillableCC
  11. K91.62
    Intraoperative hemorrhage and hematoma of a digestive system organ or structure complicating other procedure
    BillableCC
  12. K91.7
    Accidental puncture and laceration of a digestive system organ or structure during a procedure
    Header
  13. K91.71
    Accidental puncture and laceration of a digestive system organ or structure during a digestive system procedure
    BillableCC
  14. K91.72
    Accidental puncture and laceration of a digestive system organ or structure during other procedure
    BillableCC
  15. K91.8
    Other intraoperative and postprocedural complications and disorders of digestive system
    Header
  16. K91.81
    Other intraoperative complications of digestive system
    BillableCC
  17. K91.82
    Postprocedural hepatic failure
    BillableCC
  18. K91.83
    Postprocedural hepatorenal syndrome
    BillableCC
  19. K91.84
    Postprocedural hemorrhage of a digestive system organ or structure following a procedure
    Header
  20. K91.840
    Postprocedural hemorrhage of a digestive system organ or structure following a digestive system procedure
    BillableCC
  21. K91.841
    Postprocedural hemorrhage of a digestive system organ or structure following other procedure
    BillableCC
  22. K91.85
    Complications of intestinal pouch
    Header
  23. K91.850
    Pouchitis
    BillableCC463
    Inclusion terms 1

    Inclusion terms

    • Inflammation of internal ileoanal pouch
  24. K91.858
    Other complications of intestinal pouch
    BillableCC463
  25. K91.86
    Retained cholelithiasis following cholecystectomy
    BillableCC
  26. K91.87
    Postprocedural hematoma and seroma of a digestive system organ or structure following a procedure
    Header
  27. K91.870
    Postprocedural hematoma of a digestive system organ or structure following a digestive system procedure
    BillableCC
  28. K91.871
    Postprocedural hematoma of a digestive system organ or structure following other procedure
    BillableCC
  29. K91.872
    Postprocedural seroma of a digestive system organ or structure following a digestive system procedure
    BillableCC
  30. K91.873
    Postprocedural seroma of a digestive system organ or structure following other procedure
    BillableCC
  31. K91.89
    Other postprocedural complications and disorders of digestive system
    BillableCC
    Excludes2 1, Use additional code 1

    Excludes2

    • postprocedural retroperitoneal abscess (K68.11) K68.11

    Use additional code

    • code, if applicable, to further specify disorder

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 K91

Excludes2

  • complications of artificial opening of digestive system (K94.-) K94
  • complications of bariatric procedures (K95.-) K95
  • gastrojejunal ulcer (K28.-) K28
  • postprocedural (radiation) retroperitoneal abscess (K68.11) K68.11
  • radiation colitis (K52.0) K52.0
  • radiation gastroenteritis (K52.0) K52.0
  • radiation proctitis (K62.7) K62.7

Notes that also apply

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

Index entries

  • Dumping syndrome (postgastrectomy) → K91.1
  • Postgastrectomy dumping syndrome → K91.1
  • Tachyalimentation → K91.2
  • Postcholecystectomy syndrome → K91.5
  • Pouchitis → K91.850
  • Vomitingfollowing gastrointestinal surgery → K91.0
  • Achlorhydria, achlorhydric (neurogenic)secondary to vagotomy → K91.1
  • Diarrhea, diarrheal (disease) (infantile) (inflammatory)postgastrectomy → K91.1
  • Diarrhea, diarrheal (disease) (infantile) (inflammatory)postvagotomy → K91.1
  • Syndromedumping (postgastrectomy) → K91.1
  • Syndromepostgastrectomy (dumping) → K91.1
  • Syndromepostgastric surgery → K91.1
  • Syndromepostvagotomy → K91.1
  • Malabsorptionpostgastrectomy → K91.2
  • Malabsorptionpostsurgical → K91.2
  • Malnutritionfollowing gastrointestinal surgery → K91.2
  • Remnantcystic duct, postcholecystectomy → K91.5
  • Syndromecystic duct stump → K91.5
  • Syndromepostcholecystectomy → K91.5
  • Bleedingtooth socket (post-extraction) → K91.840
  • Inflammation, inflamed, inflammatory (with exudation)ileoanal (internal) pouch → K91.850
  • Inflammation, inflamed, inflammatory (with exudation)intestinal pouch → K91.850
  • Complication(s) (from) (of)intestinal pouch NEC → K91.858
  • Retainedcholelithiasis following cholecystectomy → K91.86
  • Retainedgallstones, following cholecystectomy → K91.86
  • Retentioncholelithiasis following cholecystectomy → K91.86
  • Retentiongallstones, following cholecystectomy → K91.86
  • Difficult, difficulty (in)mechanical, gastroduodenal stoma → K91.89
  • Ileus (bowel) (colon) (inhibitory) (intestine)postoperative → K91.89
  • Parotitis, parotiditis (allergic)(nonspecific toxic) (purulent) (septic) (suppurative)postoperative → K91.89
  • Parotitis, parotiditis (allergic)(nonspecific toxic) (purulent) (septic) (suppurative)surgical → K91.89
  • Syndromeafferent loop NEC → K91.89
  • Syndromegastrojejunal loop obstruction → K91.89
  • Syndromepost-polypectomy coagulation → K91.89
  • Vomitingbilious (cause unknown)following gastro-intestinal surgery → K91.0
  • Complication(s) (from) (of)surgical procedure (on)dumping syndrome (postgastrectomy) → K91.1
  • Complication(s) (from) (of)surgical procedure (on)postgastrectomy dumping syndrome → K91.1
  • Complication(s) (from) (of)surgical procedure (on)postvagotomy syndrome → K91.1
  • Complication(s) (from) (of)surgical procedure (on)malabsorption (postsurgical) NEC → K91.2
  • Malabsorptionsyndromepostsurgical → K91.2

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

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

Hierarchy