C7A.00 — Malignant carcinoid tumor of unspecified site
Is C7A.00 billable?
Yes, but C7A.00 is an unspecified code. C7A.00 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, C7A.00 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.00 — the more specific alternatives are listed below.
C7A.00 at a glance
| Code | C7A.00 |
|---|---|
| Description | Malignant carcinoid tumor of unspecified site |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does C7A.00 group to?
C7A.00 sits in MDC 17 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.
- 826Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with MCCsurgical
- 827Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures with CCsurgical
- 828Myeloproliferative Disorders or Poorly Differentiated Neoplasms with Major O.R. Procedures without CC/MCCsurgical
As a secondary diagnosis, C7A.00 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is C7A.00 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to C7A.00. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Tumor › carcinoid › malignant
Use additional code — inherited from C7A
Report an additional code alongside C7A.00 to fully describe the condition. C7A.00 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.00, but a patient may have both at the same time. When documentation supports it, C7A.00 and the excluded code may both be reported.
Code also — inherited from C7A
Two codes may be needed to describe the condition fully. Whether C7A.00 is sequenced first depends on the reason for the encounter.
- any associated multiple endocrine neoplasia [MEN] syndromes (E31.2-)
How long has C7A.00 existed?
C7A.00 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.