ICD-10 · PDGM grouping
C77 Secondary and unspecified malignant neoplasm of lymph nodes
All 8 codes in the C77 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 C77
7 of the 8 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases; 1 is assigned no clinical group. 7 of the 8 count toward the Secondary Neoplasm of Lymph Nodes comorbidity subgroup; 1 is assigned none. 7 of the 8 can lead a claim.
- Secondary Neoplasm of Lymph Nodes
Every code in C77
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 |
|---|---|---|---|---|
| C77.0 | Secondary and unspecified malignant neoplasm of lymph nodes of head, face and neckCMS: Sec and unsp malig neoplasm of nodes of head, face and neck | Can lead a claim | K | Secondary Neoplasm of Lymph Nodes |
| C77.1 | Secondary and unspecified malignant neoplasm of intrathoracic lymph nodesCMS: Secondary and unsp malignant neoplasm of intrathorac nodes | Can lead a claim | K | Secondary Neoplasm of Lymph Nodes |
| C77.2 | Secondary and unspecified malignant neoplasm of intra-abdominal lymph nodesCMS: Secondary and unsp malignant neoplasm of intra-abd nodes | Can lead a claim | K | Secondary Neoplasm of Lymph Nodes |
| C77.3 | Secondary and unspecified malignant neoplasm of axilla and upper limb lymph nodesCMS: Sec and unsp malig neoplasm of axilla and upper limb nodes | Can lead a claim | K | Secondary Neoplasm of Lymph Nodes |
| C77.4 | Secondary and unspecified malignant neoplasm of inguinal and lower limb lymph nodesCMS: Sec and unsp malig neoplasm of inguinal and lower limb nodes | Can lead a claim | K | Secondary Neoplasm of Lymph Nodes |
| C77.5 | Secondary and unspecified malignant neoplasm of intrapelvic lymph nodesCMS: Secondary and unsp malignant neoplasm of intrapelv nodes | Can lead a claim | K | Secondary Neoplasm of Lymph Nodes |
| C77.8 | Secondary and unspecified malignant neoplasm of lymph nodes of multiple regionsCMS: Sec and unsp malig neoplasm of nodes of multiple regions | Can lead a claim | K | Secondary Neoplasm of Lymph Nodes |
| C77.9 | Secondary and unspecified malignant neoplasm of lymph node, unspecifiedCMS: Secondary and unsp malignant neoplasm of lymph node, unsp | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
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.
The monthly home health regs digest
What CMS changed, what's due next, and what to do about it — one email a month, no fluff. Read the first issue