ICD-10 · PDGM grouping
C7B Secondary neuroendocrine tumors
All 8 codes in the C7B 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
8
Can lead a claim
7
Cannot lead a claim
1
What CMS assigns to C7B
7 of the 8 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases; 1 is assigned no clinical group. 6 of the 8 count toward the Secondary Carcinoid and Neuroendocrine Carcinoma comorbidity subgroup; 2 are assigned none. 7 of the 8 can lead a claim.
- Secondary Carcinoid and Neuroendocrine Carcinoma
Every code in C7B
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 |
|---|---|---|---|---|
| C7B.0 Secondary carcinoid tumors | ||||
| C7B.00 | Secondary carcinoid tumors, unspecified site | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C7B.01 | Secondary carcinoid tumors of distant lymph nodes | Can lead a claim | K | Secondary Carcinoid and Neuroendocrine Carcinoma |
| C7B.02 | Secondary carcinoid tumors of liver | Can lead a claim | K | Secondary Carcinoid and Neuroendocrine Carcinoma |
| C7B.03 | Secondary carcinoid tumors of bone | Can lead a claim | K | Secondary Carcinoid and Neuroendocrine Carcinoma |
| C7B.04 | Secondary carcinoid tumors of peritoneum | Can lead a claim | K | Secondary Carcinoid and Neuroendocrine Carcinoma |
| C7B.09 | Secondary carcinoid tumors of other sites | Can lead a claim | K | Secondary Carcinoid and Neuroendocrine Carcinoma |
| C7B.1 | Secondary Merkel cell carcinoma | Can lead a claim | K | None |
| C7B.8 | Other secondary neuroendocrine tumors | Can lead a claim | K | Secondary Carcinoid 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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