C7A.029 — Malignant carcinoid tumor of the large intestine, unspecified portion

BillableUnspecifiedCC

Is C7A.029 billable?

Yes, but C7A.029 is an unspecified code. C7A.029 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, C7A.029 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting C7A.029 — the more specific alternatives are listed below.

More specific alternatives

C7A.029 at a glance

Code	C7A.029
Description	Malignant carcinoid tumor of the large intestine, unspecified portion
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does C7A.029 group to?

C7A.029 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, C7A.029 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.

How is C7A.029 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to C7A.029. They show the wording a clinician may have documented, which often differs from the Tabular description.

Tumor › carcinoid › malignant › colon
Tumor › carcinoid › malignant › large intestine

Inclusion terms

Alternative wording in documentation that is classified to C7A.029.

Malignant carcinoid tumor of the colon NOS

Use additional code — inherited from C7A

Report an additional code alongside C7A.029 to fully describe the condition. C7A.029 is sequenced first.

code to identify any associated endocrine syndrome, such as:
carcinoid syndrome (E34.00)

Excludes2 — not included here — inherited from C7A

The conditions below are not part of C7A.029, but a patient may have both at the same time. When documentation supports it, C7A.029 and the excluded code may both be reported.

malignant pancreatic islet cell tumors (C25.4)
Merkel cell carcinoma (C4A.-)

Code also — inherited from C7A

Two codes may be needed to describe the condition fully. Whether C7A.029 is sequenced first depends on the reason for the encounter.

any associated multiple endocrine neoplasia [MEN] syndromes (E31.2-)

How long has C7A.029 existed?

C7A.029 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.