Melanoma in situ of unsp upper limb, including shoulder

This code signifies the presence of melanoma that is confined to the epidermis (in situ) and has not invaded the dermis or deeper tissues. It specifically refers to such a lesion located on an unspecified part of the upper limb, which includes the shoulder. This represents the earliest stage of melanoma, often referred to as Stage 0.

This code is appropriate when documentation confirms a diagnosis of melanoma in situ on any part of the upper limb, and the specific laterality (left or right) or precise anatomical site within the upper limb (e.g., forearm, hand) is not specified. It is used when pathology reports confirm melanoma in situ and the physician's documentation indicates the general upper limb location.

• Ensure documentation clearly states "in situ" to differentiate from invasive melanoma.
• Avoid using this code if the laterality (left or right upper limb) is specified; use a more specific code from the D03.6- subcategory.
• Always review the pathology report for definitive diagnosis and stage.