ICD-10 · PDGM grouping
C7A Malignant neuroendocrine tumors
All 23 codes in the C7A family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
Codes in family
23
Can lead a claim
22
Cannot lead a claim
1
What CMS assigns to C7A
22 of the 23 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases; 1 is assigned no clinical group. 22 of the 23 count toward the Merkel Cell and Neuroendocrine Carcinoma comorbidity subgroup; 1 is assigned none. 22 of the 23 can lead a claim.
- Merkel Cell and Neuroendocrine Carcinoma
Every code in C7A
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| C7A.0 Malignant carcinoid tumors | ||||
| C7A.00 | Malignant carcinoid tumor of unspecified site | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C7A.01 Malignant carcinoid tumors of the small intestine | ||||
| C7A.010 | Malignant carcinoid tumor of the duodenum | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.011 | Malignant carcinoid tumor of the jejunum | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.012 | Malignant carcinoid tumor of the ileum | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.019 | Malignant carcinoid tumor of the small intestine, unspecified portionCMS: Malignant carcinoid tumor of the sm int, unsp portion | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.02 Malignant carcinoid tumors of the appendix, large intestine, and rectum | ||||
| C7A.020 | Malignant carcinoid tumor of the appendix | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.021 | Malignant carcinoid tumor of the cecum | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.022 | Malignant carcinoid tumor of the ascending colon | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.023 | Malignant carcinoid tumor of the transverse colon | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.024 | Malignant carcinoid tumor of the descending colon | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.025 | Malignant carcinoid tumor of the sigmoid colon | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.026 | Malignant carcinoid tumor of the rectum | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.029 | Malignant carcinoid tumor of the large intestine, unspecified portionCMS: Malignant carcinoid tumor of the lg int, unsp portion | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.09 Malignant carcinoid tumors of other sites | ||||
| C7A.090 | Malignant carcinoid tumor of the bronchus and lung | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.091 | Malignant carcinoid tumor of the thymus | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.092 | Malignant carcinoid tumor of the stomach | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.093 | Malignant carcinoid tumor of the kidney | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.094 | Malignant carcinoid tumor of the foregut, unspecified | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.095 | Malignant carcinoid tumor of the midgut, unspecified | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.096 | Malignant carcinoid tumor of the hindgut, unspecified | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.098 | Malignant carcinoid tumors of other sites | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.1 | Malignant poorly differentiated neuroendocrine tumors | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
| C7A.8 | Other malignant neuroendocrine tumors | Can lead a claim | K | Merkel Cell and Neuroendocrine Carcinoma |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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