C79
Header — not billableSecondary malignant neoplasm of other and unspecified sites
The ICD-10 code for secondary malignant neoplasm of other and unspecified sites is C79.
C79 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 10 more specific codes below.
Clinical notes
Excludes1 (not coded here)
An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
- •Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under C79
- C79.0Secondary malignant neoplasm of kidney and renal pelvisnon-billable header
- C79.1Secondary malignant neoplasm of bladder and other and unspecified urinary organsnon-billable header
- C79.2Secondary malignant neoplasm of skin
- C79.3Secondary malignant neoplasm of brain and cerebral meningesnon-billable header
- C79.4Secondary malignant neoplasm of other and unspecified parts of nervous systemnon-billable header
- C79.5Secondary malignant neoplasm of bone and bone marrownon-billable header
- C79.6Secondary malignant neoplasm of ovarynon-billable header
- C79.7Secondary malignant neoplasm of adrenal glandnon-billable header
- C79.8Secondary malignant neoplasm of other specified sitesnon-billable header
- C79.9Secondary malignant neoplasm of unspecified site
Related codes in this category
- C76Malignant neoplasm of other and ill-defined sitesnon-billable header
- C77Secondary and unspecified malignant neoplasm of lymph nodesnon-billable header
- C78Secondary malignant neoplasm of respiratory and digestive organsnon-billable header
- C80Malignant neoplasm without specification of sitenon-billable header
- C79Secondary malignant neoplasm of other and unspecified sitesnon-billable header