K59.3
Header — not billableMegacolon, not elsewhere classified
The ICD-10 code for megacolon, not elsewhere classified is K59.3.
K59.3 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 2 more specific codes below.
Clinical notes
Code first
This code represents a manifestation of an underlying disease. Coding convention requires the underlying (etiology) code to be sequenced first, with this code listed second.
Excludes1 (not coded here)
An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).
Also known as
Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.
- Dilatation of colon
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
- •This code represents a manifestation. Documentation should identify the underlying condition, which must be coded first.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under K59.3
Related codes in this category
- K59.0Constipationnon-billable header
- K59.1Functional diarrhea
- K59.2Neurogenic bowel, not elsewhere classified
- K59.4Anal spasm
- K59.8Other specified functional intestinal disordersnon-billable header
- K59.9Functional intestinal disorder, unspecified
- K59.3Megacolon, not elsewhere classifiednon-billable header