Alphabetic Index FY2027

K31

Other diseases of stomach and duodenum

FY2027Chapter 11: Diseases of the digestive system/K20–K31 Diseases of esophagus, stomach and duodenum

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

K31 is a non-billable ICD-10-CM code category for other diseases of stomach and duodenum. 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 K31.0 Acute dilatation of stomach; K31.1 Adult hypertrophic pyloric stenosis; K31.B Hypertrophic pyloric stenosis, in childhood; K31.2 Hourglass stricture and stenosis of stomach and 8 more. Its coding notes include 11 Excludes2 entries.

Excludes2

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

This code
Also from chapter/block level (9 notes)
Inherited from K20–K31 Diseases of esophagus, stomach and duodenum
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)

Includes

Further defines or gives examples of the content of the category.

This code
  • functional disorders of stomach

More specific codes under K31 12