ICD-10-CM › K00-K95 › K55-K64 › K59 Other functional intestinal disorders › K59.1
Functional diarrhea
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2007 Added to the draft code set draft Functional diarrhea
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from K59 Other functional intestinal disorders
Excludes1 - never coded here
- change in bowel habit NOS (R19.4)
- intestinal malabsorption (K90.-)
- psychogenic intestinal disorders (F45.8)
Excludes2 - not included here
- functional disorders of stomach (K31.-)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Diarrhea, diarrheal > functional
- Diarrhea, diarrheal > neurogenic
Codes in the same group
| Code | Description | Status |
|---|---|---|
| K59.0 | Constipation | Not billable |
| K59.2 | Neurogenic bowel, not elsewhere classified | Valid |
| K59.3 | Megacolon, not elsewhere classified | Not billable |
| K59.4 | Anal spasm | Valid |
| K59.8 | Other specified functional intestinal disorders | Not billable |
| K59.9 | Functional intestinal disorder, unspecified | Valid |