C43.0 Malignant melanoma of lip

Billable ICD-10-CM code, FY2026.

Excludes1 (never code together)

• malignant neoplasm of vermilion border of lip (C00.0-C00.2)

Applies from C43 Malignant melanoma of skin

Excludes1 (never code together)

• melanoma in situ (D03.-)

Excludes2 (not included here)

• malignant melanoma of skin of genital organs (C51-C52, C60.-, C63.-)
• Merkel cell carcinoma (C4A.-)
• sites other than skin-code to malignant neoplasm of the site

Risk adjustment (HCC)

• CMS-HCC V28: HCC 23 — Prostate, Breast, and Other Cancers and Tumors
• CMS-HCC V22: HCC 12 — Breast, Prostate, and Other Cancers and Tumors
• RxHCC V08: HCC 22 — Prostate, Breast, Bladder, and Other Cancers and Tumors
• ESRD V24: HCC 12

MS-DRG index

Defines the logic of DRG(s) 595-596 in MDC 09.

Approximate ICD-9-CM (GEMs)

• 172.0 Malignant melanoma of skin of lip (approximate)

Code annotations containing back-references to C43.0

Back-references to C43.0

• Type 1 Excludes: C00 Malignant neoplasm of lip ("malignant melanoma of lip (C43.0)")

Back-references to C43

• Type 1 Excludes: C44 Other and unspecified malignant neoplasm of skin ("malignant melanoma of skin (C43.-)")

Diagnosis Index entries for C43.0

• Melanoma (malignant) › skin › lip (lower) (upper)

Nearby codes

• C43 Malignant melanoma of skin
• C43.0 Malignant melanoma of lip (this code)
• C43.1 Malignant melanoma of eyelid, including canthus
• C43.10 Malignant melanoma of unspecified eyelid, including canthus
• C43.11 Malignant melanoma of right eyelid, including canthus
• C43.111 Malignant melanoma of right upper eyelid, including canthus
• C43.112 Malignant melanoma of right lower eyelid, including canthus