ICD-10 Code C44.601 – Unspecified malignant neoplasm of skin of unspecified upper limb, including shoulder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C44.601 – Unspecified malignant neoplasm of skin of unspecified upper limb, including shoulder
What it is
This code identifies a malignant skin tumor on the upper limb or shoulder when the exact site is not documented. Use it when the record confirms skin cancer but does not specify the arm, forearm, hand, or shoulder location.
Clinical signs
Clinical features vary; refer to documentation. Skin cancers may appear as a nonhealing lesion, changing mole, ulcer, or raised growth, but the diagnosis should be supported by pathology or a clear clinician statement.
When to use this code
Use this code when the provider documents a malignant neoplasm of skin on an upper limb or shoulder, but the site is unspecified. It also fits when the chart lacks enough detail to assign a more specific subsite. Do not guess laterality or exact anatomy.
Do not use for
Do not use this code for benign skin lesions, carcinoma in situ, or malignant neoplasms with a documented specific site. Check documentation if the lesion is on another body area.
Coding tip
Query for the exact anatomic site whenever the record says only “skin cancer” or “malignant lesion” on the upper limb.