ICD-10-CM Section · C43-C44
Melanoma and other malignant neoplasms of skin
213 codes in this section
213
Total Codes
149
Billable
64
Header (Non-Billable)
3
Top-Level Codes
About Section C43-C44
Section C43-C44 (C43-C44) covers melanoma and other malignant neoplasms of skin. It sits within the Neoplasms chapter (C00-D49). This section contains 213 ICD-10-CM codes, 149 billable diagnoses you can submit on a claim, and 64 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
Codes in C43-C44
Grouped by 3-character root code. Click any code for full detail.
C43
Malignant melanoma of skin
32 subcodes
| C43.0 | Malignant melanoma of lip | Billable |
| C43.1 | Malignant melanoma of eyelid, including canthus | Header |
| C43.10 | Malignant melanoma of unspecified eyelid, including canthus | Billable |
| C43.11 | Malignant melanoma of right eyelid, including canthus | Header |
| C43.111 | Malignant melanoma of right upper eyelid, including canthus | Billable |
| C43.112 | Malignant melanoma of right lower eyelid, including canthus | Billable |
| C43.12 | Malignant melanoma of left eyelid, including canthus | Header |
| C43.121 | Malignant melanoma of left upper eyelid, including canthus | Billable |
| C43.122 | Malignant melanoma of left lower eyelid, including canthus | Billable |
| C43.2 | Malignant melanoma of ear and external auricular canal | Header |
| C43.20 | Malignant melanoma of unspecified ear and external auricular canal | Billable |
| C43.21 | Malignant melanoma of right ear and external auricular canal | Billable |
| C43.22 | Malignant melanoma of left ear and external auricular canal | Billable |
| C43.3 | Malignant melanoma of other and unspecified parts of face | Header |
| C43.30 | Malignant melanoma of unspecified part of face | Billable |
| C43.31 | Malignant melanoma of nose | Billable |
| C43.39 | Malignant melanoma of other parts of face | Billable |
| C43.4 | Malignant melanoma of scalp and neck | Billable |
| C43.5 | Malignant melanoma of trunk | Header |
| C43.51 | Malignant melanoma of anal skin | Billable |
| C43.52 | Malignant melanoma of skin of breast | Billable |
| C43.59 | Malignant melanoma of other part of trunk | Billable |
| C43.6 | Malignant melanoma of upper limb, including shoulder | Header |
| C43.60 | Malignant melanoma of unspecified upper limb, including shoulder | Billable |
| C43.61 | Malignant melanoma of right upper limb, including shoulder | Billable |
| C43.62 | Malignant melanoma of left upper limb, including shoulder | Billable |
| C43.7 | Malignant melanoma of lower limb, including hip | Header |
| C43.70 | Malignant melanoma of unspecified lower limb, including hip | Billable |
| C43.71 | Malignant melanoma of right lower limb, including hip | Billable |
| C43.72 | Malignant melanoma of left lower limb, including hip | Billable |
| C43.8 | Malignant melanoma of overlapping sites of skin | Billable |
| C43.9 | Malignant melanoma of skin, unspecified | Billable |
C44
Other and unspecified malignant neoplasm of skin
146 subcodes
| C44.0 | Other and unspecified malignant neoplasm of skin of lip | Header |
| C44.00 | Unspecified malignant neoplasm of skin of lip | Billable |
| C44.01 | Basal cell carcinoma of skin of lip | Billable |
| C44.02 | Squamous cell carcinoma of skin of lip | Billable |
| C44.09 | Other specified malignant neoplasm of skin of lip | Billable |
| C44.1 | Other and unspecified malignant neoplasm of skin of eyelid, including canthus | Header |
| C44.10 | Unspecified malignant neoplasm of skin of eyelid, including canthus | Header |
| C44.101 | Unspecified malignant neoplasm of skin of unspecified eyelid, including canthus | Billable |
| C44.102 | Unspecified malignant neoplasm of skin of right eyelid, including canthus | Header |
| C44.1021 | Unspecified malignant neoplasm of skin of right upper eyelid, including canthus | Billable |
| C44.1022 | Unspecified malignant neoplasm of skin of right lower eyelid, including canthus | Billable |
| C44.109 | Unspecified malignant neoplasm of skin of left eyelid, including canthus | Header |
| C44.1091 | Unspecified malignant neoplasm of skin of left upper eyelid, including canthus | Billable |
| C44.1092 | Unspecified malignant neoplasm of skin of left lower eyelid, including canthus | Billable |
| C44.11 | Basal cell carcinoma of skin of eyelid, including canthus | Header |
| C44.111 | Basal cell carcinoma of skin of unspecified eyelid, including canthus | Billable |
| C44.112 | Basal cell carcinoma of skin of right eyelid, including canthus | Header |
| C44.1121 | Basal cell carcinoma of skin of right upper eyelid, including canthus | Billable |
| C44.1122 | Basal cell carcinoma of skin of right lower eyelid, including canthus | Billable |
| C44.119 | Basal cell carcinoma of skin of left eyelid, including canthus | Header |
| C44.1191 | Basal cell carcinoma of skin of left upper eyelid, including canthus | Billable |
| C44.1192 | Basal cell carcinoma of skin of left lower eyelid, including canthus | Billable |
| C44.12 | Squamous cell carcinoma of skin of eyelid, including canthus | Header |
| C44.121 | Squamous cell carcinoma of skin of unspecified eyelid, including canthus | Billable |
| C44.122 | Squamous cell carcinoma of skin of right eyelid, including canthus | Header |
| C44.1221 | Squamous cell carcinoma of skin of right upper eyelid, including canthus | Billable |
| C44.1222 | Squamous cell carcinoma of skin of right lower eyelid, including canthus | Billable |
| C44.129 | Squamous cell carcinoma of skin of left eyelid, including canthus | Header |
| C44.1291 | Squamous cell carcinoma of skin of left upper eyelid, including canthus | Billable |
| C44.1292 | Squamous cell carcinoma of skin of left lower eyelid, including canthus | Billable |
| C44.13 | Sebaceous cell carcinoma of skin of eyelid, including canthus | Header |
| C44.131 | Sebaceous cell carcinoma of skin of unspecified eyelid, including canthus | Billable |
| C44.132 | Sebaceous cell carcinoma of skin of right eyelid, including canthus | Header |
| C44.1321 | Sebaceous cell carcinoma of skin of right upper eyelid, including canthus | Billable |
| C44.1322 | Sebaceous cell carcinoma of skin of right lower eyelid, including canthus | Billable |
| C44.139 | Sebaceous cell carcinoma of skin of left eyelid, including canthus | Header |
| C44.1391 | Sebaceous cell carcinoma of skin of left upper eyelid, including canthus | Billable |
| C44.1392 | Sebaceous cell carcinoma of skin of left lower eyelid, including canthus | Billable |
| C44.19 | Other specified malignant neoplasm of skin of eyelid, including canthus | Header |
| C44.191 | Other specified malignant neoplasm of skin of unspecified eyelid, including canthus | Billable |
| C44.192 | Other specified malignant neoplasm of skin of right eyelid, including canthus | Header |
| C44.1921 | Other specified malignant neoplasm of skin of right upper eyelid, including canthus | Billable |
| C44.1922 | Other specified malignant neoplasm of skin of right lower eyelid, including canthus | Billable |
| C44.199 | Other specified malignant neoplasm of skin of left eyelid, including canthus | Header |
| C44.1991 | Other specified malignant neoplasm of skin of left upper eyelid, including canthus | Billable |
| C44.1992 | Other specified malignant neoplasm of skin of left lower eyelid, including canthus | Billable |
| C44.2 | Other and unspecified malignant neoplasm of skin of ear and external auricular canal | Header |
| C44.20 | Unspecified malignant neoplasm of skin of ear and external auricular canal | Header |
| C44.201 | Unspecified malignant neoplasm of skin of unspecified ear and external auricular canal | Billable |
| C44.202 | Unspecified malignant neoplasm of skin of right ear and external auricular canal | Billable |
| C44.209 | Unspecified malignant neoplasm of skin of left ear and external auricular canal | Billable |
| C44.21 | Basal cell carcinoma of skin of ear and external auricular canal | Header |
| C44.211 | Basal cell carcinoma of skin of unspecified ear and external auricular canal | Billable |
| C44.212 | Basal cell carcinoma of skin of right ear and external auricular canal | Billable |
| C44.219 | Basal cell carcinoma of skin of left ear and external auricular canal | Billable |
| C44.22 | Squamous cell carcinoma of skin of ear and external auricular canal | Header |
| C44.221 | Squamous cell carcinoma of skin of unspecified ear and external auricular canal | Billable |
| C44.222 | Squamous cell carcinoma of skin of right ear and external auricular canal | Billable |
| C44.229 | Squamous cell carcinoma of skin of left ear and external auricular canal | Billable |
| C44.29 | Other specified malignant neoplasm of skin of ear and external auricular canal | Header |
| C44.291 | Other specified malignant neoplasm of skin of unspecified ear and external auricular canal | Billable |
| C44.292 | Other specified malignant neoplasm of skin of right ear and external auricular canal | Billable |
| C44.299 | Other specified malignant neoplasm of skin of left ear and external auricular canal | Billable |
| C44.3 | Other and unspecified malignant neoplasm of skin of other and unspecified parts of face | Header |
| C44.30 | Unspecified malignant neoplasm of skin of other and unspecified parts of face | Header |
| C44.300 | Unspecified malignant neoplasm of skin of unspecified part of face | Billable |
| C44.301 | Unspecified malignant neoplasm of skin of nose | Billable |
| C44.309 | Unspecified malignant neoplasm of skin of other parts of face | Billable |
| C44.31 | Basal cell carcinoma of skin of other and unspecified parts of face | Header |
| C44.310 | Basal cell carcinoma of skin of unspecified parts of face | Billable |
| C44.311 | Basal cell carcinoma of skin of nose | Billable |
| C44.319 | Basal cell carcinoma of skin of other parts of face | Billable |
| C44.32 | Squamous cell carcinoma of skin of other and unspecified parts of face | Header |
| C44.320 | Squamous cell carcinoma of skin of unspecified parts of face | Billable |
| C44.321 | Squamous cell carcinoma of skin of nose | Billable |
| C44.329 | Squamous cell carcinoma of skin of other parts of face | Billable |
| C44.39 | Other specified malignant neoplasm of skin of other and unspecified parts of face | Header |
| C44.390 | Other specified malignant neoplasm of skin of unspecified parts of face | Billable |
| C44.391 | Other specified malignant neoplasm of skin of nose | Billable |
| C44.399 | Other specified malignant neoplasm of skin of other parts of face | Billable |
| C44.4 | Other and unspecified malignant neoplasm of skin of scalp and neck | Header |
| C44.40 | Unspecified malignant neoplasm of skin of scalp and neck | Billable |
| C44.41 | Basal cell carcinoma of skin of scalp and neck | Billable |
| C44.42 | Squamous cell carcinoma of skin of scalp and neck | Billable |
| C44.49 | Other specified malignant neoplasm of skin of scalp and neck | Billable |
| C44.5 | Other and unspecified malignant neoplasm of skin of trunk | Header |
| C44.50 | Unspecified malignant neoplasm of skin of trunk | Header |
| C44.500 | Unspecified malignant neoplasm of anal skin | Billable |
| C44.501 | Unspecified malignant neoplasm of skin of breast | Billable |
| C44.509 | Unspecified malignant neoplasm of skin of other part of trunk | Billable |
| C44.51 | Basal cell carcinoma of skin of trunk | Header |
| C44.510 | Basal cell carcinoma of anal skin | Billable |
| C44.511 | Basal cell carcinoma of skin of breast | Billable |
| C44.519 | Basal cell carcinoma of skin of other part of trunk | Billable |
| C44.52 | Squamous cell carcinoma of skin of trunk | Header |
| C44.520 | Squamous cell carcinoma of anal skin | Billable |
| C44.521 | Squamous cell carcinoma of skin of breast | Billable |
| C44.529 | Squamous cell carcinoma of skin of other part of trunk | Billable |
| C44.59 | Other specified malignant neoplasm of skin of trunk | Header |
| C44.590 | Other specified malignant neoplasm of anal skin | Billable |
| C44.591 | Other specified malignant neoplasm of skin of breast | Billable |
| C44.599 | Other specified malignant neoplasm of skin of other part of trunk | Billable |
| C44.6 | Other and unspecified malignant neoplasm of skin of upper limb, including shoulder | Header |
| C44.60 | Unspecified malignant neoplasm of skin of upper limb, including shoulder | Header |
| C44.601 | Unspecified malignant neoplasm of skin of unspecified upper limb, including shoulder | Billable |
| C44.602 | Unspecified malignant neoplasm of skin of right upper limb, including shoulder | Billable |
| C44.609 | Unspecified malignant neoplasm of skin of left upper limb, including shoulder | Billable |
| C44.61 | Basal cell carcinoma of skin of upper limb, including shoulder | Header |
| C44.611 | Basal cell carcinoma of skin of unspecified upper limb, including shoulder | Billable |
| C44.612 | Basal cell carcinoma of skin of right upper limb, including shoulder | Billable |
| C44.619 | Basal cell carcinoma of skin of left upper limb, including shoulder | Billable |
| C44.62 | Squamous cell carcinoma of skin of upper limb, including shoulder | Header |
| C44.621 | Squamous cell carcinoma of skin of unspecified upper limb, including shoulder | Billable |
| C44.622 | Squamous cell carcinoma of skin of right upper limb, including shoulder | Billable |
| C44.629 | Squamous cell carcinoma of skin of left upper limb, including shoulder | Billable |
| C44.69 | Other specified malignant neoplasm of skin of upper limb, including shoulder | Header |
| C44.691 | Other specified malignant neoplasm of skin of unspecified upper limb, including shoulder | Billable |
| C44.692 | Other specified malignant neoplasm of skin of right upper limb, including shoulder | Billable |
| C44.699 | Other specified malignant neoplasm of skin of left upper limb, including shoulder | Billable |
| C44.7 | Other and unspecified malignant neoplasm of skin of lower limb, including hip | Header |
| C44.70 | Unspecified malignant neoplasm of skin of lower limb, including hip | Header |
| C44.701 | Unspecified malignant neoplasm of skin of unspecified lower limb, including hip | Billable |
| C44.702 | Unspecified malignant neoplasm of skin of right lower limb, including hip | Billable |
| C44.709 | Unspecified malignant neoplasm of skin of left lower limb, including hip | Billable |
| C44.71 | Basal cell carcinoma of skin of lower limb, including hip | Header |
| C44.711 | Basal cell carcinoma of skin of unspecified lower limb, including hip | Billable |
| C44.712 | Basal cell carcinoma of skin of right lower limb, including hip | Billable |
| C44.719 | Basal cell carcinoma of skin of left lower limb, including hip | Billable |
| C44.72 | Squamous cell carcinoma of skin of lower limb, including hip | Header |
| C44.721 | Squamous cell carcinoma of skin of unspecified lower limb, including hip | Billable |
| C44.722 | Squamous cell carcinoma of skin of right lower limb, including hip | Billable |
| C44.729 | Squamous cell carcinoma of skin of left lower limb, including hip | Billable |
| C44.79 | Other specified malignant neoplasm of skin of lower limb, including hip | Header |
| C44.791 | Other specified malignant neoplasm of skin of unspecified lower limb, including hip | Billable |
| C44.792 | Other specified malignant neoplasm of skin of right lower limb, including hip | Billable |
| C44.799 | Other specified malignant neoplasm of skin of left lower limb, including hip | Billable |
| C44.8 | Other and unspecified malignant neoplasm of overlapping sites of skin | Header |
| C44.80 | Unspecified malignant neoplasm of overlapping sites of skin | Billable |
| C44.81 | Basal cell carcinoma of overlapping sites of skin | Billable |
| C44.82 | Squamous cell carcinoma of overlapping sites of skin | Billable |
| C44.89 | Other specified malignant neoplasm of overlapping sites of skin | Billable |
| C44.9 | Other and unspecified malignant neoplasm of skin, unspecified | Header |
| C44.90 | Unspecified malignant neoplasm of skin, unspecified | Billable |
| C44.91 | Basal cell carcinoma of skin, unspecified | Billable |
| C44.92 | Squamous cell carcinoma of skin, unspecified | Billable |
| C44.99 | Other specified malignant neoplasm of skin, unspecified | Billable |
C4A
Merkel cell carcinoma
32 subcodes
| C4A.0 | Merkel cell carcinoma of lip | Billable |
| C4A.1 | Merkel cell carcinoma of eyelid, including canthus | Header |
| C4A.10 | Merkel cell carcinoma of unspecified eyelid, including canthus | Billable |
| C4A.11 | Merkel cell carcinoma of right eyelid, including canthus | Header |
| C4A.111 | Merkel cell carcinoma of right upper eyelid, including canthus | Billable |
| C4A.112 | Merkel cell carcinoma of right lower eyelid, including canthus | Billable |
| C4A.12 | Merkel cell carcinoma of left eyelid, including canthus | Header |
| C4A.121 | Merkel cell carcinoma of left upper eyelid, including canthus | Billable |
| C4A.122 | Merkel cell carcinoma of left lower eyelid, including canthus | Billable |
| C4A.2 | Merkel cell carcinoma of ear and external auricular canal | Header |
| C4A.20 | Merkel cell carcinoma of unspecified ear and external auricular canal | Billable |
| C4A.21 | Merkel cell carcinoma of right ear and external auricular canal | Billable |
| C4A.22 | Merkel cell carcinoma of left ear and external auricular canal | Billable |
| C4A.3 | Merkel cell carcinoma of other and unspecified parts of face | Header |
| C4A.30 | Merkel cell carcinoma of unspecified part of face | Billable |
| C4A.31 | Merkel cell carcinoma of nose | Billable |
| C4A.39 | Merkel cell carcinoma of other parts of face | Billable |
| C4A.4 | Merkel cell carcinoma of scalp and neck | Billable |
| C4A.5 | Merkel cell carcinoma of trunk | Header |
| C4A.51 | Merkel cell carcinoma of anal skin | Billable |
| C4A.52 | Merkel cell carcinoma of skin of breast | Billable |
| C4A.59 | Merkel cell carcinoma of other part of trunk | Billable |
| C4A.6 | Merkel cell carcinoma of upper limb, including shoulder | Header |
| C4A.60 | Merkel cell carcinoma of unspecified upper limb, including shoulder | Billable |
| C4A.61 | Merkel cell carcinoma of right upper limb, including shoulder | Billable |
| C4A.62 | Merkel cell carcinoma of left upper limb, including shoulder | Billable |
| C4A.7 | Merkel cell carcinoma of lower limb, including hip | Header |
| C4A.70 | Merkel cell carcinoma of unspecified lower limb, including hip | Billable |
| C4A.71 | Merkel cell carcinoma of right lower limb, including hip | Billable |
| C4A.72 | Merkel cell carcinoma of left lower limb, including hip | Billable |
| C4A.8 | Merkel cell carcinoma of overlapping sites | Billable |
| C4A.9 | Merkel cell carcinoma, unspecified | Billable |
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Verified against the CMS 2026 code set on May 31, 2026.
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