Benign lipomatous neoplasm of skin, subcu of left arm

This code signifies a non-cancerous fatty tumor located within the skin or the tissue directly beneath it on the patient's left arm. These are typically slow-growing, soft, movable masses that are generally asymptomatic unless they grow large enough to cause pressure or cosmetic concerns.

Apply this code when documentation confirms a benign lipoma or other benign lipomatous neoplasm affecting the skin or subcutaneous tissue specifically of the left arm. This diagnosis is often made clinically but may be confirmed by imaging (e.g., ultrasound, MRI) or biopsy.

• Ensure the documentation specifies "benign" and clearly identifies the "left arm" as the anatomical site.
• Distinguish from malignant liposarcomas (C49.1x) or lipomas of internal organs.
• If the exact laterality is not documented, consider using an unspecified code if no further clarification can be obtained.