ICDcodes.org
FY2027

C18.4 — Malignant neoplasm of transverse colon

BillableCC

Is C18.4 billable?

Yes — C18.4 is billable for FY2027. C18.4 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. C18.4 may be submitted for encounters from October 1, 2026 through September 30, 2027.

C18.4 at a glance

CodeC18.4
DescriptionMalignant neoplasm of transverse colon
BillableYes
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

Which MS-DRGs does C18.4 group to?

C18.4 sits in MDC 06 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

  • 374Digestive Malignancy with MCCmedical
  • 375Digestive Malignancy with CCmedical
  • 376Digestive Malignancy without CC/MCCmedical

As a secondary diagnosis, C18.4 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.

Excludes1 — never code together — inherited from C15-C26

The conditions below can never be reported together with C18.4 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • Kaposi's sarcoma of gastrointestinal sites (C46.4)

Excludes1 — never code together — inherited from C18

The conditions below can never be reported together with C18.4 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • malignant carcinoid tumors of the colon (C7A.02-)

Excludes2 — not included here — inherited from C15-C26

The conditions below are not part of C18.4, but a patient may have both at the same time. When documentation supports it, C18.4 and the excluded code may both be reported.

  • gastrointestinal stromal tumors (C49.A-)

How long has C18.4 existed?

C18.4 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

What other codes are in the C18 family? (9)