ICD-10-CM category
C79: Secondary malignant neoplasm of other and unspecified sites
Codes under C79 (Secondary malignant neoplasm of other and unspecified sites). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| C79.0 | Secondary malignant neoplasm of kidney and renal pelvis | — |
| C79.0 | Secondary malignant neoplasm of kidney and renal pelvis | — |
| C79.00 | Secondary malignant neoplasm of unspecified kidney and renal pelvis | ✓ |
| C79.00 | Secondary malignant neoplasm of unspecified kidney and renal pelvis | ✓ |
| C79.01 | Secondary malignant neoplasm of right kidney and renal pelvis | ✓ |
| C79.01 | Secondary malignant neoplasm of right kidney and renal pelvis | ✓ |
| C79.1 | Secondary malignant neoplasm of bladder and other and unspecified urinary organs | — |
| C79.1 | Secondary malignant neoplasm of bladder and other and unspecified urinary organs | — |
| C79.02 | Secondary malignant neoplasm of left kidney and renal pelvis | ✓ |
| C79.02 | Secondary malignant neoplasm of left kidney and renal pelvis | ✓ |
| C79.2 | Secondary malignant neoplasm of skin | ✓ |
| C79.2 | Secondary malignant neoplasm of skin | ✓ |
| C79.3 | Secondary malignant neoplasm of brain and cerebral meninges | — |
| C79.3 | Secondary malignant neoplasm of brain and cerebral meninges | — |
| C79.4 | Secondary malignant neoplasm of other and unspecified parts of nervous system | — |
| C79.4 | Secondary malignant neoplasm of other and unspecified parts of nervous system | — |
| C79.5 | Secondary malignant neoplasm of bone and bone marrow | — |
| C79.5 | Secondary malignant neoplasm of bone and bone marrow | — |
| C79.6 | Secondary malignant neoplasm of ovary | — |
| C79.6 | Secondary malignant neoplasm of ovary | — |
| C79.7 | Secondary malignant neoplasm of adrenal gland | — |
| C79.7 | Secondary malignant neoplasm of adrenal gland | — |
| C79.8 | Secondary malignant neoplasm of other specified sites | — |
| C79.8 | Secondary malignant neoplasm of other specified sites | — |
| C79.9 | Secondary malignant neoplasm of unspecified site | ✓ |
| C79.9 | Secondary malignant neoplasm of unspecified site | ✓ |
| C79.10 | Secondary malignant neoplasm of unspecified urinary organs | ✓ |
| C79.10 | Secondary malignant neoplasm of unspecified urinary organs | ✓ |
| C79.11 | Secondary malignant neoplasm of bladder | ✓ |
| C79.11 | Secondary malignant neoplasm of bladder | ✓ |
| C79.19 | Secondary malignant neoplasm of other urinary organs | ✓ |
| C79.19 | Secondary malignant neoplasm of other urinary organs | ✓ |
| C79.31 | Secondary malignant neoplasm of brain | ✓ |
| C79.31 | Secondary malignant neoplasm of brain | ✓ |
| C79.32 | Secondary malignant neoplasm of cerebral meninges | ✓ |
| C79.32 | Secondary malignant neoplasm of cerebral meninges | ✓ |
| C79.40 | Secondary malignant neoplasm of unspecified part of nervous system | ✓ |
| C79.40 | Secondary malignant neoplasm of unspecified part of nervous system | ✓ |
| C79.49 | Secondary malignant neoplasm of other parts of nervous system | ✓ |
| C79.49 | Secondary malignant neoplasm of other parts of nervous system | ✓ |
| C79.51 | Secondary malignant neoplasm of bone | ✓ |
| C79.51 | Secondary malignant neoplasm of bone | ✓ |
| C79.52 | Secondary malignant neoplasm of bone marrow | ✓ |
| C79.52 | Secondary malignant neoplasm of bone marrow | ✓ |
| C79.60 | Secondary malignant neoplasm of unspecified ovary | ✓ |
| C79.60 | Secondary malignant neoplasm of unspecified ovary | ✓ |
| C79.61 | Secondary malignant neoplasm of right ovary | ✓ |
| C79.61 | Secondary malignant neoplasm of right ovary | ✓ |
| C79.62 | Secondary malignant neoplasm of left ovary | ✓ |
| C79.62 | Secondary malignant neoplasm of left ovary | ✓ |
| C79.63 | Secondary malignant neoplasm of bilateral ovaries | ✓ |
| C79.63 | Secondary malignant neoplasm of bilateral ovaries | ✓ |
| C79.70 | Secondary malignant neoplasm of unspecified adrenal gland | ✓ |
| C79.70 | Secondary malignant neoplasm of unspecified adrenal gland | ✓ |
| C79.71 | Secondary malignant neoplasm of right adrenal gland | ✓ |
| C79.71 | Secondary malignant neoplasm of right adrenal gland | ✓ |
| C79.72 | Secondary malignant neoplasm of left adrenal gland | ✓ |
| C79.72 | Secondary malignant neoplasm of left adrenal gland | ✓ |
| C79.81 | Secondary malignant neoplasm of breast | ✓ |
| C79.81 | Secondary malignant neoplasm of breast | ✓ |
| C79.82 | Secondary malignant neoplasm of genital organs | ✓ |
| C79.82 | Secondary malignant neoplasm of genital organs | ✓ |
| C79.83 | Secondary malignant neoplasm of oral cavity | ✓ |
| C79.89 | Secondary malignant neoplasm of other specified sites | ✓ |
| C79.89 | Secondary malignant neoplasm of other specified sites | ✓ |
Frequently asked questions
What is ICD-10-CM code C79?
C79 is an ICD-10-CM category covering Secondary malignant neoplasm of other and unspecified sites. It contains 65 more specific diagnosis codes, 49 of which are billable.
Is C79 a billable code?
No — C79 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example C79.0 — Secondary malignant neoplasm of kidney and renal pelvis). 49 of the 65 codes under C79 are billable.
What codes fall under C79?
C79 includes C79.0, C79.0, C79.00, C79.00, C79.01, plus 60 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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