Patient presents with a concerning skin lesion suspicious for malignant melanoma.  The patient reports a change in size, shape, or color of a pre-existing mole or the development of a new, irregular mole.  History includes (and should specify):  patient age, Fitzpatrick skin type, personal or family history of melanoma, history of sun exposure and tanning bed use, and any relevant comorbidities.  Physical examination reveals a pigmented lesion with asymmetry, border irregularity, color variegation, diameter greater than 6mm, and evolving features.  Dermoscopic examination may reveal atypical network, blue-white veil, irregular dots and globules, or other concerning features.  Differential diagnoses include atypical nevus, basal cell carcinoma, squamous cell carcinoma, and seborrheic keratosis.  Biopsy performed and sent for histopathologic evaluation to confirm diagnosis and determine Breslow thickness, Clark level, mitotic rate, presence of ulceration, and microsatellites.  Based on the pathology results, staging will be performed according to the American Joint Committee on Cancer (AJCC) staging system.  Treatment plan will be determined based on stage and may include wide local excision, sentinel lymph node biopsy, adjuvant therapy such as immunotherapy or targeted therapy, radiation therapy, andor palliative care.  Patient education provided regarding sun protection, skin self-examination, and follow-up care.  Referral to oncology andor dermatology for further evaluation and management as indicated.  ICD-10 code C43.9 Malignant melanoma of skin, unspecified will be utilized pending definitive pathology and staging.  CPT codes for biopsy, excision, and other procedures will be determined based on the specific procedures performed.