C44.121 Squamous cell carcinoma of skin of unspecified eyelid, including canthus

Billable ICD-10-CM code, FY2026.

Applies from C44 Other and unspecified malignant neoplasm of skin

Includes

• malignant neoplasm of sebaceous glands
• malignant neoplasm of sweat glands

Excludes1 (never code together)

• Kaposi's sarcoma of skin (C46.0)
• malignant melanoma of skin (C43.-)
• malignant neoplasm of skin of genital organs (C51-C52, C60.-, C63.2)
• Merkel cell carcinoma (C4A.-)

Applies from C44.1 Other and unspecified malignant neoplasm of skin of eyelid, including canthus

Excludes1 (never code together)

• connective tissue of eyelid (C49.0)

MS-DRG index

Defines the logic of DRG(s) 124-125 in MDC 02.

Approximate ICD-9-CM (GEMs)

• 173.12 Squamous cell carcinoma of eyelid, including canthus (approximate)

Code annotations containing back-references to C44.121

Back-references to C44.1

• Type 1 Excludes: C69 Malignant neoplasm of eye and adnexa ("malignant neoplasm of eyelid (skin) (C43.1-, C44.1-)")

Back-references to C44

• Type 1 Excludes: C76 Malignant neoplasm of other and ill-defined sites ("malignant neoplasm of skin (C44.-)")

Nearby codes

• C44.1122 Basal cell carcinoma of skin of right lower eyelid, including canthus
• C44.119 Basal cell carcinoma of skin of left eyelid, including canthus
• C44.1191 Basal cell carcinoma of skin of left upper eyelid, including canthus
• C44.1192 Basal cell carcinoma of skin of left lower eyelid, including canthus
• C44.12 Squamous cell carcinoma of skin of eyelid, including canthus
• C44.121 Squamous cell carcinoma of skin of unspecified eyelid, including canthus (this code)
• C44.122 Squamous cell carcinoma of skin of right eyelid, including canthus
• C44.1221 Squamous cell carcinoma of skin of right upper eyelid, including canthus
• C44.1222 Squamous cell carcinoma of skin of right lower eyelid, including canthus
• C44.129 Squamous cell carcinoma of skin of left eyelid, including canthus
• C44.1291 Squamous cell carcinoma of skin of left upper eyelid, including canthus