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C47.9 vs C79.89

C47.9 (Malignant neoplasm of peripheral nerves and autonomic nervous system, unspecified) compared with C79.89 (Secondary malignant neoplasm of other specified sites), from the official CMS tabular data. C47.9 and C79.89 name the same anatomical site (ganglia) with a different neoplasm behavior.

Relationship

Informational

Neoplasm table relationship

C47.9
Malignant neoplasm of peripheral nerves and autonomic nervous system, unspecified
↔
C79.89
Secondary malignant neoplasm of other specified sites

Same anatomical site, different neoplasm behavior.

Same site — secondary malignancy (ganglia)

The behavior documented for the site — malignant primary, secondary, carcinoma in situ, benign, uncertain or unspecified — decides which column of the neoplasm table, and therefore which code, applies.

Source: CMS Table of Neoplasms

Can these codes be reported together?

Same site, different neoplasm behavior. C47.9 and C79.89 name the same anatomical site (ganglia) with a different neoplasm behavior.

From the CMS Table of Neoplasms: the behavior documented for that site — malignant primary, secondary, carcinoma in situ, benign, uncertain or unspecified — decides which column, and therefore which code, applies.

Side by side

C47.9Malignant neoplasm of peripheral nerves and autonomic nervous system, unspecifiedC79.89Secondary malignant neoplasm of other specified sites
Billing statusBillableBillable
ClassificationC00-D49 — Neoplasms (C00-D49)C00-D49 — Neoplasms (C00-D49)
DefinitionMalignant neoplasm of peripheral nerves and autonomic nervous system, unspecified is a billable ICD-10-CM diagnosis code (C47.9).Secondary malignant neoplasm of other specified sites is a billable ICD-10-CM diagnosis code (C79.89).
Includes
malignant neoplasm of sympathetic and parasympathetic nerves and ganglia
Malignant neoplasm of unspecified site of peripheral nerves and autonomic nervous system
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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources