ICD-10 · PDGM grouping
C43 Malignant melanoma of skin
All 24 codes in the C43 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
Codes in family
24
Can lead a claim
18
Cannot lead a claim
6
What CMS assigns to C43
18 of the 24 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases; 6 are assigned no clinical group. None of the 24 is assigned a comorbidity subgroup. 18 of the 24 can lead a claim.
Every code in C43
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| C43.0 | Malignant melanoma of lip | Can lead a claim | K | None |
| C43.1 Malignant melanoma of eyelid, including canthus | ||||
| C43.10 | Malignant melanoma of unspecified eyelid, including canthus | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C43.11 Malignant melanoma of right eyelid, including canthus | ||||
| C43.111 | Malignant melanoma of right upper eyelid, including canthus | Can lead a claim | K | None |
| C43.112 | Malignant melanoma of right lower eyelid, including canthus | Can lead a claim | K | None |
| C43.12 Malignant melanoma of left eyelid, including canthus | ||||
| C43.121 | Malignant melanoma of left upper eyelid, including canthus | Can lead a claim | K | None |
| C43.122 | Malignant melanoma of left lower eyelid, including canthus | Can lead a claim | K | None |
| C43.2 Malignant melanoma of ear and external auricular canal | ||||
| C43.20 | Malignant melanoma of unspecified ear and external auricular canalCMS: Malignant melanoma of unsp ear and external auricular canal | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C43.21 | Malignant melanoma of right ear and external auricular canal | Can lead a claim | K | None |
| C43.22 | Malignant melanoma of left ear and external auricular canal | Can lead a claim | K | None |
| C43.3 Malignant melanoma of other and unspecified parts of face | ||||
| C43.30 | Malignant melanoma of unspecified part of face | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C43.31 | Malignant melanoma of nose | Can lead a claim | K | None |
| C43.39 | Malignant melanoma of other parts of face | Can lead a claim | K | None |
| C43.4 | Malignant melanoma of scalp and neck | Can lead a claim | K | None |
| C43.5 Malignant melanoma of trunk | ||||
| C43.51 | Malignant melanoma of anal skin | Can lead a claim | K | None |
| C43.52 | Malignant melanoma of skin of breast | Can lead a claim | K | None |
| C43.59 | Malignant melanoma of other part of trunk | Can lead a claim | K | None |
| C43.6 Malignant melanoma of upper limb, including shoulder | ||||
| C43.60 | Malignant melanoma of unspecified upper limb, including shoulderCMS: Malignant melanoma of unsp upper limb, including shoulder | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C43.61 | Malignant melanoma of right upper limb, including shoulder | Can lead a claim | K | None |
| C43.62 | Malignant melanoma of left upper limb, including shoulder | Can lead a claim | K | None |
| C43.7 Malignant melanoma of lower limb, including hip | ||||
| C43.70 | Malignant melanoma of unspecified lower limb, including hip | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C43.71 | Malignant melanoma of right lower limb, including hip | Can lead a claim | K | None |
| C43.72 | Malignant melanoma of left lower limb, including hip | Can lead a claim | K | None |
| C43.8 | Malignant melanoma of overlapping sites of skin | Can lead a claim | K | None |
| C43.9 | Malignant melanoma of skin, unspecified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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