ICD10
ICD-10 Code C79.8: Secondary malignant neoplasm of other specified sites
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Neoplasms (C00-D49).
When is it used?
- May be used when a clinician documents secondary malignant neoplasm of other specified sites in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
- This entry may represent a broader category rather than the most specific billable code.
Code hierarchy
chapter
2Neoplasms (C00-D49)
block
C00-C96Malignant neoplasms
block
C76-C80Malignant neoplasms of ill-defined, other secondary and unspecified sites
category
C79Secondary malignant neoplasm of other and unspecified sites
currentC79
Where you may see this code
You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.
Related specialists
OncologistGeneral Physician
Related codes
Sibling codes
C79.0Secondary malignant neoplasm of kidney and renal pelvisC79.1Secondary malignant neoplasm of bladder and other and unspecified urinary organsC79.2Secondary malignant neoplasm of skinbillableC79.3Secondary malignant neoplasm of brain and cerebral meningesC79.4Secondary malignant neoplasm of other and unspecified parts of nervous systemC79.5Secondary malignant neoplasm of bone and bone marrowC79.6Secondary malignant neoplasm of ovaryC79.7Secondary malignant neoplasm of adrenal glandC79.9Secondary malignant neoplasm of unspecified sitebillable
Mapped diagnoses and classifications
SNOMED_CT 12246641000119104high
Bilateral metastatic malignant neoplasm to breasts
Source: SNOMED International ICD-10 map
SNOMED_CT 404090003high
Malignant infiltration of oral cavity by underlying tumour
Source: SNOMED International ICD-10 map
SNOMED_CT 278433008high
Malignant infiltration of soft tissue
Source: SNOMED International ICD-10 map
SNOMED_CT 404094007high
Metastasis involving oral cavity
Source: SNOMED International ICD-10 map
SNOMED_CT 255124004high
Metastasis to peripheral nerve
Source: SNOMED International ICD-10 map
SNOMED_CT 1237530005high
Metastatic adenocarcinoma to carotid body
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
C79.8
Replacement codes
C79.81 — Secondary malignant neoplasm of breastC79.82 — Secondary malignant neoplasm of genital organsC79.89 — Secondary malignant neoplasm of other specified sites
Common synonyms
Secondary malignant neoplasm of other specified sites
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.