ICD-10/C79.2

C79.2 ICD 2026 Code: Secondary malignant neoplasm of skin

C79.2 is the authoritative medical code for Secondary malignant neoplasm of skin. This classification is used in medical billing and clinical recording to specify the clinical criteria for secondary malignant neoplasm of skin (ICD-10-CM C79.2), ensuring healthcare documentation aligns with 2026 federal coding standards.

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Official Registry Overview & Definition

Secondary malignant neoplasm of skin is a billable ICD-10-CM diagnosis code C79.2. Excludes1 (not coded here): secondary Merkel cell carcinoma C7B.1; secondary carcinoid tumors C7B.-; secondary neuroendocrine tumors C7B.-.

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for C79.2 in the official ICD-10-CM tabular list.

Excludes1 — Not Coded Here

Conditions that can never be reported with this code; the two are mutually exclusive.

  • secondary Merkel cell carcinoma C7B.1
  • secondary carcinoid tumors C7B.-
  • secondary neuroendocrine tumors C7B.-

Frequently Asked Questions (FAQ) & Clinical Guidance

What can't be coded together with C79.2?

Per Excludes1 instructions, C79.2 must not be reported with: secondary Merkel cell carcinoma (C7B.1); secondary carcinoid tumors (C7B.-); secondary neuroendocrine tumors (C7B.-).

Codes in This Family (10)

Official ICD-10-CM classifications in the same code family as C79.2, with their registry titles.

  • C79 — Secondary malignant neoplasm of other and unspecified sites
  • C79.0 — Secondary malignant neoplasm of kidney and renal pelvis
  • C79.1 — Secondary malignant neoplasm of bladder and other and unspecified urinary organs
  • C79.3 — Secondary malignant neoplasm of brain and cerebral meninges
  • C79.4 — Secondary malignant neoplasm of other and unspecified parts of nervous system
  • C79.5 — Secondary malignant neoplasm of bone and bone marrow
  • C79.6 — Secondary malignant neoplasm of ovary
  • C79.7 — Secondary malignant neoplasm of adrenal gland
  • C79.8 — Secondary malignant neoplasm of other specified sites
  • C79.9 — Secondary malignant neoplasm of unspecified site

Neoplasm Table Sites (137)

Anatomical sites from the official ICD-10-CM Table of Neoplasms that map to this code, with the matching behavior column.

  • Neoplasm, neoplastic, abdomen, abdominal, wall — Malignant, Secondary
  • Neoplasm, neoplastic, ala nasi (external) — Malignant, Secondary
  • Neoplasm, neoplastic, anus, anal, margin — Malignant, Secondary
  • Neoplasm, neoplastic, anus, anal, skin — Malignant, Secondary
  • Neoplasm, neoplastic, auditory, canal (external) (skin) — Malignant, Secondary
  • Neoplasm, neoplastic, auricle, ear — Malignant, Secondary
  • Neoplasm, neoplastic, auricular canal (external) — Malignant, Secondary
  • Neoplasm, neoplastic, axilla, axillary, fold — Malignant, Secondary
  • Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts), mastectomy site (skin) — Malignant, Secondary
  • Neoplasm, neoplastic, breast (connective tissue) (glandular tissue) (soft parts), skin — Malignant, Secondary
  • Neoplasm, neoplastic, brow — Malignant, Secondary
  • Neoplasm, neoplastic, canal, auditory (external) — Malignant, Secondary
  • Neoplasm, neoplastic, canal, auricular (external) — Malignant, Secondary
  • Neoplasm, neoplastic, canthus (eye) (inner) (outer) — Malignant, Secondary
  • Neoplasm, neoplastic, cheek, external — Malignant, Secondary
  • Neoplasm, neoplastic, chin — Malignant, Secondary
  • Neoplasm, neoplastic, columnella — Malignant, Secondary
  • Neoplasm, neoplastic, concha — Malignant, Secondary
  • Neoplasm, neoplastic, connective tissue NEC, skin NEC (dermis) — Malignant, Secondary
  • Neoplasm, neoplastic, ear (external) — Malignant, Secondary
  • Neoplasm, neoplastic, ear (external), auricle or auris — Malignant, Secondary
  • Neoplasm, neoplastic, ear (external), canal, external — Malignant, Secondary
  • Neoplasm, neoplastic, ear (external), external meatus — Malignant, Secondary
  • Neoplasm, neoplastic, ear (external), lobule — Malignant, Secondary
  • Neoplasm, neoplastic, ear (external), skin — Malignant, Secondary
  • Neoplasm, neoplastic, earlobe — Malignant, Secondary
  • Neoplasm, neoplastic, external, meatus (ear) — Malignant, Secondary
  • Neoplasm, neoplastic, eyebrow — Malignant, Secondary
  • Neoplasm, neoplastic, forehead (skin) — Malignant, Secondary
  • Neoplasm, neoplastic, helix — Malignant, Secondary
  • Neoplasm, neoplastic, jaw, skin — Malignant, Secondary
  • Neoplasm, neoplastic, lid (lower) (upper) — Malignant, Secondary
  • Neoplasm, neoplastic, lip, skin (commissure) (lower) (upper) — Malignant, Secondary
  • Neoplasm, neoplastic, mastectomy site (skin) — Malignant, Secondary
  • Neoplasm, neoplastic, meatus external (ear) — Malignant, Secondary
  • Neoplasm, neoplastic, meibomian gland — Malignant, Secondary
  • Neoplasm, neoplastic, nail — Malignant, Secondary
  • Neoplasm, neoplastic, nail, finger — Malignant, Secondary
  • Neoplasm, neoplastic, nail, toe — Malignant, Secondary
  • Neoplasm, neoplastic, nasolabial groove — Malignant, Secondary
  • Neoplasm, neoplastic, nates — Malignant, Secondary
  • Neoplasm, neoplastic, nose, nasal, ala (external) (nasi) — Malignant, Secondary
  • Neoplasm, neoplastic, nose, nasal, external (skin) — Malignant, Secondary
  • Neoplasm, neoplastic, nose, nasal, skin — Malignant, Secondary
  • Neoplasm, neoplastic, palpebra — Malignant, Secondary
  • Neoplasm, neoplastic, perianal (skin) — Malignant, Secondary
  • Neoplasm, neoplastic, pinna NEC (ear) — Malignant, Secondary
  • Neoplasm, neoplastic, scalp — Malignant, Secondary
  • Neoplasm, neoplastic, scar NEC — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, abdominal wall — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, ala nasi — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, ankle — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, antecubital space — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, anus — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, arm — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, auditory canal (external) — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, auricle (ear) — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, auricular canal (external) — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, axilla, axillary fold — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, back — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, breast — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, brow — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, buttock — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, calf — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, canthus (eye) (inner) (outer) — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, cervical region — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, cheek (external) — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, chest (wall) — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, chin — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, clavicular area — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, columnella — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, concha — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, ear (external) — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, elbow — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, eyebrow — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, eyelid — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, face NOS — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, finger — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, flank — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, foot — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, forearm — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, forehead — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, glabella — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, gluteal region — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, groin — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, hand — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, head NEC — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, heel — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, helix — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, hip — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, infraclavicular region — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, inguinal region — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, jaw — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, knee — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, leg — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, lid (lower) (upper) — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, limb NEC — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, limb NEC, lower — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, limb NEC, upper — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, lip (lower) (upper) — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, mastectomy site (skin) — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, meatus, acoustic (external) — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, nates — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, neck — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, nose (external) — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, palm — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, palpebra — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, perianal — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, perineum — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, pinna — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, plantar — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, popliteal fossa or space — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, pubes — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, sacrococcygeal region — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, scalp — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, scapular region — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, shoulder — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, sole (foot) — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, specified sites NEC — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, submammary fold — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, supraclavicular region — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, temple — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, thigh — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, thoracic wall — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, thumb — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, toe — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, tragus — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, trunk — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, umbilicus — Malignant, Secondary
  • Neoplasm, neoplastic, skin NOS, wrist — Malignant, Secondary
  • Neoplasm, neoplastic, sudoriferous, sudoriparous gland, site unspecified — Malignant, Secondary
  • Neoplasm, neoplastic, sweat gland, site unspecified (apocrine) (eccrine) — Malignant, Secondary
  • Neoplasm, neoplastic, temple (skin) — Malignant, Secondary
  • Neoplasm, neoplastic, temporal, region, skin — Malignant, Secondary
  • Neoplasm, neoplastic, tragus — Malignant, Secondary
  • Neoplasm, neoplastic, umbilicus, umbilical — Malignant, Secondary

Related Codes & Numerical Sequence (Crawl Map)

Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:

ICD Code C75.2 Malignant neoplasm of craniopharyngeal duct
ICD Code C76.2 Malignant neoplasm of abdomen
ICD Code C77.2 Secondary and unspecified malignant neoplasm of intra-abdominal lymph nodes
ICD Code C78.2 Secondary malignant neoplasm of pleura
ICD Code C80.2 Malignant neoplasm associated with transplanted organ
ICD Code C81.2 Mixed cellularity Hodgkin lymphoma
ICD Code C82.2 Follicular lymphoma grade III, unspecified
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