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Dx

ICD-10-CM 2027

ICD-10 code for melanoma

C43.9

Malignant melanoma of skin, unspecified

✓ Billable / specific

From the official ICD-10-CM alphabetic index entry “Melanoma (malignant)”. Page updated September 29, 2026.

About coding melanoma

The ICD-10-CM code for melanoma is C43.9 (Malignant melanoma of skin, unspecified). The official index lists 159 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on C43.9.

Within C43, choose C43.9 (unspecified) only when documentation doesn't support a more specific option: lip (C43.0), eyelid, including canthus (C43.1), ear and external auricular canal (C43.2), other and unspecified parts of face (C43.3), scalp and neck (C43.4), trunk (C43.5), upper limb, including shoulder (C43.6), lower limb, including hip (C43.7) and 1 more.

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 595 (Major Skin Disorders with MCC, relative weight 2.0239) and DRG 596 (Major Skin Disorders without MCC, relative weight 1.1071), in MDC 09 (Diseases and Disorders of the Skin, Subcutaneous Tissue and Breast), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

More specific melanoma codes (official index)

  • acral lentiginous, malignant
  • amelanotic
  • balloon cell
  • benign
  • desmoplastic, malignant
  • epithelioid cell
  • with spindle cell, mixed
  • in
  • giant pigmented nevus
  • Hutchinson's melanotic freckle
  • junctional nevus
  • precancerous melanosis
  • in situ D03.9 — Melanoma in situ, unspecified
  • abdominal wall D03.59 — Melanoma in situ of other part of trunk
  • ala nasi D03.39 — Melanoma in situ of other parts of face
  • ankle D03.7 — Melanoma in situ of lower limb, including hip
  • anus, anal (margin) (skin) D03.51 — Melanoma in situ of anal skin
  • arm D03.6 — Melanoma in situ of upper limb, including shoulder
  • auditory canal D03.2 — Melanoma in situ of ear and external auricular canal
  • auricle (ear) D03.2 — Melanoma in situ of ear and external auricular canal
  • auricular canal (external) D03.2 — Melanoma in situ of ear and external auricular canal
  • axilla, axillary fold D03.59 — Melanoma in situ of other part of trunk
  • back D03.59 — Melanoma in situ of other part of trunk
  • breast D03.52 — Melanoma in situ of breast (skin) (soft tissue)
  • brow D03.39 — Melanoma in situ of other parts of face
  • buttock D03.59 — Melanoma in situ of other part of trunk
  • canthus (eye) D03.1 — Melanoma in situ of eyelid, including canthus
  • cheek (external) D03.39 — Melanoma in situ of other parts of face
  • chest wall D03.59 — Melanoma in situ of other part of trunk
  • chin D03.39 — Melanoma in situ of other parts of face
  • choroid D03.8 — Melanoma in situ of other sites
  • conjunctiva D03.8 — Melanoma in situ of other sites
  • ear (external) D03.2 — Melanoma in situ of ear and external auricular canal
  • external meatus (ear) D03.2 — Melanoma in situ of ear and external auricular canal
  • eye D03.8 — Melanoma in situ of other sites
  • eyebrow D03.39 — Melanoma in situ of other parts of face
  • eyelid (lower) (upper) D03.1 — Melanoma in situ of eyelid, including canthus
  • face D03.30 — Melanoma in situ of unspecified part of face
  • specified NEC D03.39 — Melanoma in situ of other parts of face
  • female genital organ (external) NEC D03.8 — Melanoma in situ of other sites
  • finger D03.6 — Melanoma in situ of upper limb, including shoulder
  • flank D03.59 — Melanoma in situ of other part of trunk
  • foot D03.7 — Melanoma in situ of lower limb, including hip
  • forearm D03.6 — Melanoma in situ of upper limb, including shoulder
  • forehead D03.39 — Melanoma in situ of other parts of face
  • foreskin D03.8 — Melanoma in situ of other sites
  • gluteal region D03.59 — Melanoma in situ of other part of trunk
  • groin D03.59 — Melanoma in situ of other part of trunk
  • hand D03.6 — Melanoma in situ of upper limb, including shoulder
  • heel D03.7 — Melanoma in situ of lower limb, including hip
  • helix D03.2 — Melanoma in situ of ear and external auricular canal
  • hip D03.7 — Melanoma in situ of lower limb, including hip
  • interscapular region D03.59 — Melanoma in situ of other part of trunk
  • iris D03.8 — Melanoma in situ of other sites
  • jaw D03.39 — Melanoma in situ of other parts of face
  • knee D03.7 — Melanoma in situ of lower limb, including hip
  • labium (majus) (minus) D03.8 — Melanoma in situ of other sites
  • lacrimal gland D03.8 — Melanoma in situ of other sites
  • leg D03.7 — Melanoma in situ of lower limb, including hip
  • lip (lower) (upper) D03.0 — Melanoma in situ of lip
  • lower limb NEC D03.7 — Melanoma in situ of lower limb, including hip
  • male genital organ (external) NEC D03.8 — Melanoma in situ of other sites
  • nail D03.9 — Melanoma in situ, unspecified
  • finger D03.6 — Melanoma in situ of upper limb, including shoulder
  • toe D03.7 — Melanoma in situ of lower limb, including hip
  • neck D03.4 — Melanoma in situ of scalp and neck
  • nose (external) D03.39 — Melanoma in situ of other parts of face
  • orbit D03.8 — Melanoma in situ of other sites
  • penis D03.8 — Melanoma in situ of other sites
  • perianal skin D03.51 — Melanoma in situ of anal skin
  • perineum D03.51 — Melanoma in situ of anal skin
  • pinna D03.2 — Melanoma in situ of ear and external auricular canal
  • popliteal fossa or space D03.7 — Melanoma in situ of lower limb, including hip
  • prepuce D03.8 — Melanoma in situ of other sites
  • pudendum D03.8 — Melanoma in situ of other sites
  • retina D03.8 — Melanoma in situ of other sites
  • retrobulbar D03.8 — Melanoma in situ of other sites
  • scalp D03.4 — Melanoma in situ of scalp and neck
  • scrotum D03.8 — Melanoma in situ of other sites
  • shoulder D03.6 — Melanoma in situ of upper limb, including shoulder
  • specified site NEC D03.8 — Melanoma in situ of other sites
  • submammary fold D03.52 — Melanoma in situ of breast (skin) (soft tissue)
  • temple D03.39 — Melanoma in situ of other parts of face
  • thigh D03.7 — Melanoma in situ of lower limb, including hip
  • toe D03.7 — Melanoma in situ of lower limb, including hip
  • trunk NEC D03.59 — Melanoma in situ of other part of trunk
  • umbilicus D03.59 — Melanoma in situ of other part of trunk
  • upper limb NEC D03.6 — Melanoma in situ of upper limb, including shoulder
  • vulva D03.8 — Melanoma in situ of other sites
  • juvenile
  • malignant, of soft parts except skin
  • metastatic
  • breast C79.81 — Secondary malignant neoplasm of breast
  • genital organ C79.82 — Secondary malignant neoplasm of genital organs
  • specified site NEC C79.89 — Secondary malignant neoplasm of other specified sites
  • neurotropic, malignant
  • nodular
  • regressing, malignant
  • skin C43.9 — Malignant melanoma of skin, unspecified
  • abdominal wall C43.59 — Malignant melanoma of other part of trunk
  • ala nasi C43.31 — Malignant melanoma of nose
  • ankle C43.7 — Malignant melanoma of lower limb, including hip
  • anus, anal (skin) C43.51 — Malignant melanoma of anal skin
  • arm C43.6 — Malignant melanoma of upper limb, including shoulder
  • auditory canal (external) C43.2 — Malignant melanoma of ear and external auricular canal
  • auricle (ear) C43.2 — Malignant melanoma of ear and external auricular canal
  • auricular canal (external) C43.2 — Malignant melanoma of ear and external auricular canal
  • axilla, axillary fold C43.59 — Malignant melanoma of other part of trunk
  • back C43.59 — Malignant melanoma of other part of trunk
  • breast (female) (male) C43.52 — Malignant melanoma of skin of breast
  • brow C43.39 — Malignant melanoma of other parts of face
  • buttock C43.59 — Malignant melanoma of other part of trunk
  • canthus (eye) C43.1 — Malignant melanoma of eyelid, including canthus
  • cheek (external) C43.39 — Malignant melanoma of other parts of face
  • chest wall C43.59 — Malignant melanoma of other part of trunk
  • chin C43.39 — Malignant melanoma of other parts of face
  • ear (external) C43.2 — Malignant melanoma of ear and external auricular canal
  • elbow C43.6 — Malignant melanoma of upper limb, including shoulder
  • external meatus (ear) C43.2 — Malignant melanoma of ear and external auricular canal
  • eyebrow C43.39 — Malignant melanoma of other parts of face
  • eyelid (lower) (upper) C43.1 — Malignant melanoma of eyelid, including canthus
  • face C43.30 — Malignant melanoma of unspecified part of face
  • specified NEC C43.39 — Malignant melanoma of other parts of face
  • female genital organ (external) NEC C51.9 — Malignant neoplasm of vulva, unspecified
  • finger C43.6 — Malignant melanoma of upper limb, including shoulder
  • flank C43.59 — Malignant melanoma of other part of trunk
  • foot C43.7 — Malignant melanoma of lower limb, including hip
  • forearm C43.6 — Malignant melanoma of upper limb, including shoulder
  • forehead C43.39 — Malignant melanoma of other parts of face
  • foreskin C60.0 — Malignant neoplasm of prepuce
  • glabella C43.39 — Malignant melanoma of other parts of face
  • gluteal region C43.59 — Malignant melanoma of other part of trunk
  • groin C43.59 — Malignant melanoma of other part of trunk
  • hand C43.6 — Malignant melanoma of upper limb, including shoulder
  • heel C43.7 — Malignant melanoma of lower limb, including hip
  • helix C43.2 — Malignant melanoma of ear and external auricular canal
  • hip C43.7 — Malignant melanoma of lower limb, including hip
  • interscapular region C43.59 — Malignant melanoma of other part of trunk
  • jaw (external) C43.39 — Malignant melanoma of other parts of face
  • knee C43.7 — Malignant melanoma of lower limb, including hip
  • labium C51.9 — Malignant neoplasm of vulva, unspecified
  • majus C51.0 — Malignant neoplasm of labium majus
  • minus C51.1 — Malignant neoplasm of labium minus
  • leg C43.7 — Malignant melanoma of lower limb, including hip
  • lip (lower) (upper) C43.0 — Malignant melanoma of lip
  • lower limb NEC C43.7 — Malignant melanoma of lower limb, including hip
  • male genital organ (external) NEC C63.9 — Malignant neoplasm of male genital organ, unspecified
  • nail
  • finger C43.6 — Malignant melanoma of upper limb, including shoulder
  • toe C43.7 — Malignant melanoma of lower limb, including hip
  • nasolabial groove C43.39 — Malignant melanoma of other parts of face
  • nates C43.59 — Malignant melanoma of other part of trunk
  • neck C43.4 — Malignant melanoma of scalp and neck
  • nose (external) C43.31 — Malignant melanoma of nose
  • overlapping site C43.8 — Malignant melanoma of overlapping sites of skin
  • palpebra C43.1 — Malignant melanoma of eyelid, including canthus
  • penis C60.9 — Malignant neoplasm of penis, unspecified
  • perianal skin C43.51 — Malignant melanoma of anal skin
  • perineum C43.51 — Malignant melanoma of anal skin
  • pinna C43.2 — Malignant melanoma of ear and external auricular canal
  • popliteal fossa or space C43.7 — Malignant melanoma of lower limb, including hip
  • prepuce C60.0 — Malignant neoplasm of prepuce
  • pudendum C51.9 — Malignant neoplasm of vulva, unspecified
  • scalp C43.4 — Malignant melanoma of scalp and neck
  • scrotum C63.2 — Malignant neoplasm of scrotum
  • shoulder C43.6 — Malignant melanoma of upper limb, including shoulder
  • skin NEC C43.9 — Malignant melanoma of skin, unspecified
  • submammary fold C43.52 — Malignant melanoma of skin of breast
  • temple C43.39 — Malignant melanoma of other parts of face
  • thigh C43.7 — Malignant melanoma of lower limb, including hip
  • toe C43.7 — Malignant melanoma of lower limb, including hip
  • trunk NEC C43.59 — Malignant melanoma of other part of trunk
  • umbilicus C43.59 — Malignant melanoma of other part of trunk
  • upper limb NEC C43.6 — Malignant melanoma of upper limb, including shoulder
  • vulva C51.9 — Malignant neoplasm of vulva, unspecified
  • overlapping sites C51.8 — Malignant neoplasm of overlapping sites of vulva
  • spindle cell
  • with epithelioid, mixed
  • type A C69.4 — Malignant neoplasm of ciliary body
  • type B C69.4 — Malignant neoplasm of ciliary body
  • superficial spreading

Common questions about melanoma ICD-10 codes

What is the ICD-10 code for melanoma?

C43.9 — Malignant melanoma of skin, unspecified. More specific codes apply when the documentation supports them: D03.9, D03.59, D03.39, D03.7 and others below.

What is the ICD-10 code for skin melanoma?

C43.9 — Malignant melanoma of skin, unspecified.

Is C43.9 billable?

Yes. C43.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can C43.9 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict C43.9 as a principal diagnosis.

Is C43.9 a CC or MCC?

No. C43.9 is neither a CC nor an MCC under MS-DRG v44.0.