2017/18 ICD-10-CM Diagnosis Code K59.1

Functional diarrhea

Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as K59.1. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • diarrhea NOS (
    ICD-10-CM Diagnosis Code R19.7

    Diarrhea, unspecified

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Diarrhea NOS
    Type 1 Excludes
    • functional diarrhea (K59.1)
    • neonatal diarrhea (P78.3)
    • psychogenic diarrhea (F45.8)
    R19.7
    )
  • irritable bowel syndrome with diarrhea (
    ICD-10-CM Diagnosis Code K58.0

    Irritable bowel syndrome with diarrhea

      2016 2017 2018 Billable/Specific Code
    K58.0
    )
The following code(s) above K59.1 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 K59.1:
  • K00-K95
    2018 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 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
ICD-10-CM K59.1 is grouped within Diagnostic Related Group(s) (MS-DRG v35.0):

Convert K59.1 to ICD-9-CM

Code History
Code annotations containing back-references to K59.1:

Diagnosis Index entries containing back-references to K59.1:

ICD-10-CM Codes Adjacent To K59.1
K58.8 Other irritable bowel syndrome
K58.9 Irritable bowel syndrome without diarrhea
K59 Other functional intestinal disorders
K59.0 Constipation
K59.00 …… unspecified
K59.01 Slow transit constipation
K59.02 Outlet dysfunction constipation
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

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