ICD10BillableValid for clinical use
ICD-10 Code C79.2: Secondary malignant neoplasm of skin
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. 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 skin in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
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.
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
Official coding notes
Excludes1 (do not code together)
- secondary Merkel cell carcinoma (C7B.1)
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
OncologistGeneral PhysicianDermatologist
Related codes
C79.0Secondary malignant neoplasm of kidney and renal pelviscategoryC79.1Secondary malignant neoplasm of bladder and other and unspecified urinary organscategoryC79.3Secondary malignant neoplasm of brain and cerebral meningescategoryC79.4Secondary malignant neoplasm of other and unspecified parts of nervous systemcategoryC79.5Secondary malignant neoplasm of bone and bone marrowcategoryC79.6Secondary malignant neoplasm of ovarycategoryC79.7Secondary malignant neoplasm of adrenal glandcategoryC79.8Secondary malignant neoplasm of other specified sitescategoryC79.9Secondary malignant neoplasm of unspecified sitecode
Sibling codes
C79.0Secondary malignant neoplasm of kidney and renal pelvisC79.1Secondary malignant neoplasm of bladder and other and unspecified urinary organsC79.3Secondary 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 glandC79.8Secondary malignant neoplasm of other specified sitesC79.9Secondary malignant neoplasm of unspecified sitebillable
Coverage-related procedures and services
CPT 81479high
UNLISTED MOLECULAR PATHOLOGY PROCEDURE
Source: CMS coverage guidance
CPT 19325high
BREAST AUGMENTATION WITH IMPLANT
Source: CMS coverage guidance
CPT 19369high
BREAST RECONSTRUCTION; WITH BIPEDICLED TRANSVERSE RECTUS ABDOMINIS MYOCUTANEOUS (TRAM) FLAP
Source: CMS coverage guidance
CPT 19364high
BREAST RECONSTRUCTION; WITH FREE FLAP (EG, FTRAM, DIEP, SIEA, GAP FLAP)
Source: CMS coverage guidance
CPT 19361high
BREAST RECONSTRUCTION; WITH LATISSIMUS DORSI FLAP
Source: CMS coverage guidance
CPT 19367high
BREAST RECONSTRUCTION; WITH SINGLE-PEDICLED TRANSVERSE RECTUS ABDOMINIS MYOCUTANEOUS (TRAM) FLAP
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 254841008high
Carcinoma en cuirasse
Source: SNOMED International ICD-10 map
SNOMED_CT 404091004high
Malignant infiltration of skin by underlying tumour
Source: SNOMED International ICD-10 map
SNOMED_CT 14914851000119109high
Metastatic Merkel cell carcinoma to skin
Source: SNOMED International ICD-10 map
SNOMED_CT 1254750009high
Metastatic acantholytic squamous cell carcinoma to skin
Source: SNOMED International ICD-10 map
SNOMED_CT 1237621006high
Metastatic adenocarcinoma to Moll's gland
Source: SNOMED International ICD-10 map
SNOMED_CT 91231000119104high
Metastatic adenocarcinoma to skin
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
C79.2
Common synonyms
Secondary malignant neoplasm of skin
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.