C77 vs C81.29
C77 (Secondary and unspecified malignant neoplasm of lymph nodes) compared with C81.29 (Mixed cellularity Hodgkin lymphoma, extranodal and solid organ sites), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. C77 carries an Excludes1 note covering C81.29: “malignant neoplasm of lymph nodes, specified as primary (C81-C86, C88, C96.-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Yes, when both are documented. C81.29 carries an Excludes2 note covering C77: “secondary and unspecified neoplasm of lymph nodes (C77.-)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| C77Secondary and unspecified malignant neoplasm of lymph nodes | C81.29Mixed cellularity Hodgkin lymphoma, extranodal and solid organ sites | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Secondary and unspecified malignant neoplasm of lymph nodes is a non-billable ICD-10-CM category code (C77). | Mixed cellularity Hodgkin lymphoma, extranodal and solid organ sites is a billable ICD-10-CM diagnosis code (C81.29). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources