K59.3 — Megacolon, not elsewhere classified
Is K59.3 billable?
No — K59.3 is a non-billable header code. K59.3 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 2 billable codes beneath K59.3.
Billable codes under this header
K59.3 at a glance
| Code | K59.3 |
|---|---|
| Description | Megacolon, not elsewhere classified |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with K59.3 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Code first
The underlying condition below must be sequenced before K59.3. K59.3 describes a manifestation and cannot be the principal or first-listed diagnosis.
- , if applicable (T51-T65) to identify toxic agent
Inclusion terms
Alternative wording in documentation that is classified to K59.3.
- Dilatation of colon
Excludes1 — never code together — inherited from K59
The conditions below can never be reported together with K59.3 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 11
The conditions below are not part of K59.3, but a patient may have both at the same time. When documentation supports it, K59.3 and the excluded code may both be reported.
- 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)
Excludes2 — not included here — inherited from K59
The conditions below are not part of K59.3, but a patient may have both at the same time. When documentation supports it, K59.3 and the excluded code may both be reported.
- functional disorders of stomach (K31.-)
What codes fall under K59.3? (2)
How long has K59.3 existed?
K59.3 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
- FY2018: K59.3 stopped being billable
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with K59.3?
ICD-10-CM declares these codes mutually exclusive with K59.3 — exactly one of each pair can be correct for a given encounter.