K59.8

Other specified functional intestinal disorders

FY2027Chapter 11: Diseases of the digestive system/K55–K64 Other diseases of intestines

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

K59.8 is a non-billable ICD-10-CM code header for other specified functional intestinal disorders. 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 K59.81 Ogilvie syndrome and K59.89 Other specified functional intestinal disorders. Its coding notes include 3 Excludes1 entries and 9 Excludes2 entries.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Inherited from K59 Other functional intestinal disorders
  • change in bowel habit NOS (R19.4)
  • intestinal malabsorption (K90.-)
  • psychogenic intestinal disorders (F45.8)

Excludes2

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

Inherited from K59 Other functional intestinal disorders
  • functional disorders of stomach (K31.-)
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 K59.8 2