Alphabetic Index FY2027

K91

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

FY2027Chapter 11: Diseases of the digestive system/K90–K95 Other diseases of the digestive system

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

K91 is a non-billable ICD-10-CM code category for intraoperative and postprocedural complications and disorders of digestive system, not elsewhere classified. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are K91.0 Vomiting following gastrointestinal surgery; K91.1 Postgastric surgery syndromes; K91.2 Postsurgical malabsorption, not elsewhere classified; K91.3 Postprocedural intestinal obstruction and 4 more. Its coding notes include 15 Excludes2 entries.

Guidelines tip

From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

Intraoperative and postprocedural complications are coded from the body system chapters unless the complication is specifically indexed to a T code.

Guidelines I.C.19.g.5Postprocedural complications in the body system chaptersRead the official text

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

This code
  • complications of artificial opening of digestive system (K94.-)
  • complications of bariatric procedures (K95.-)
  • gastrojejunal ulcer (K28.-)
  • postprocedural (radiation) retroperitoneal abscess (K68.11)
  • radiation colitis (K52.0)
  • radiation gastroenteritis (K52.0)
  • radiation proctitis (K62.7)
Also from chapter/block level (8 notes)
Inherited from Chapter 11 Diseases of the digestive system
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

More specific codes under K91 8