2019 ICD-10-CM Diagnosis Code K59.9

Functional intestinal disorder, unspecified

    2016 2017 2018 2019 Billable/Specific Code
  • K59.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM K59.9 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of K59.9 - other international versions of ICD-10 K59.9 may differ.
The following code(s) above K59.9 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to K59.9:
  • K00-K95
    2019 ICD-10-CM Range K00-K95

    Diseases of the digestive system

    Type 2 Excludes
    • 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)
    Diseases of the digestive system
  • K59
    ICD-10-CM Diagnosis Code K59

    Other functional intestinal disorders

      2016 2017 2018 2019 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • change in bowel habit NOS (R19.4)
    • intestinal malabsorption (K90.-)
    • psychogenic intestinal disorders (F45.8)
    Type 2 Excludes
    • functional disorders of stomach (K31.-)
    Other functional intestinal disorders
Approximate Synonyms
  • Functional disorder of intestine
ICD-10-CM K59.9 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 391 Esophagitis, gastroenteritis and miscellaneous digestive disorders with mcc
  • 392 Esophagitis, gastroenteritis and miscellaneous digestive disorders without mcc

Convert K59.9 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change

Diagnosis Index entries containing back-references to K59.9:

ICD-10-CM Codes Adjacent To K59.9
K59.03 Drug induced constipation
K59.04 Chronic idiopathic constipation
K59.09 Other constipation
K59.1 Functional diarrhea
K59.2 Neurogenic bowel, not elsewhere classified
K59.3 Megacolon, not elsewhere classified
K59.31 Toxic megacolon
K59.39 Other megacolon
K59.4 Anal spasm
K59.8 Other specified functional intestinal disorders
K59.9 Functional intestinal disorder, unspecified
K60 Fissure and fistula of anal and rectal regions
K60.0 Acute anal fissure
K60.1 Chronic anal fissure
K60.2 Anal fissure, unspecified
K60.3 Anal fistula
K60.4 Rectal fistula
K60.5 Anorectal fistula
K61 Abscess of anal and rectal regions
K61.0 Anal abscess
K61.1 Rectal abscess

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.