C79.52 vs C91
C79.52 (Secondary malignant neoplasm of bone marrow) compared with C91 (Lymphoid leukemia), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. C91 carries an Excludes2 note covering C79.52: “secondary neoplasm of bone marrow (C79.52)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| C79.52Secondary malignant neoplasm of bone marrow | C91Lymphoid leukemia | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | C00-D49 — Neoplasms (C00-D49) | C00-D49 — Neoplasms (C00-D49) |
| Definition | Secondary malignant neoplasm of bone marrow is a billable ICD-10-CM diagnosis code (C79.52). | Lymphoid leukemia is a non-billable ICD-10-CM category code (C91). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources