C7A.021 — Malignant carcinoid tumor of the cecum

BillableCC

Is C7A.021 billable?

Yes — C7A.021 is billable for FY2027. C7A.021 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. C7A.021 may be submitted for encounters from October 1, 2026 through September 30, 2027.

C7A.021 at a glance

Code	C7A.021
Description	Malignant carcinoid tumor of the cecum
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does C7A.021 group to?

C7A.021 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.021 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.

How is C7A.021 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to C7A.021. They show the wording a clinician may have documented, which often differs from the Tabular description.

Tumor › carcinoid › malignant › cecum

Use additional code — inherited from C7A

Report an additional code alongside C7A.021 to fully describe the condition. C7A.021 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.021, but a patient may have both at the same time. When documentation supports it, C7A.021 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.021 is sequenced first depends on the reason for the encounter.

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

How long has C7A.021 existed?

C7A.021 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.