CPT® Code 21933

The CPT® Code 21933 refers to the excision of a tumor located in the soft tissue of the back or flank, specifically when the tumor is subfascial, meaning it is situated beneath the fascia, which is a layer of connective tissue. This procedure is applicable for tumors that measure 5 centimeters or greater. Soft tissues encompass a variety of structures, including subcutaneous fat, connective tissue, fascia, muscles, tendons, blood vessels, lymph vessels, nerves, and the tissues surrounding joints. Tumors found in these soft tissues can be either benign or malignant. Typically, benign tumors are treated through excision, while small malignant or indeterminate tumors may also be excised if they have well-defined margins. The excision process involves making a skin incision over the tumor or creating and elevating a skin flap. The surgeon then dissects the overlying tissue to expose the soft tissue mass, which is excised along with a margin of healthy tissue to ensure complete removal. In some cases, a frozen section may be performed to verify that all margins are free of tumor cells, which is a critical step in ensuring the thoroughness of the excision. After the tumor is removed, drains may be placed as necessary, and the surgical wound is closed in layers to promote proper healing. For smaller tumors in the subcutaneous fat or connective tissue, different CPT codes are used, such as 21930 for masses less than 3 cm and 21931 for masses 3 cm or greater. For tumors located below the fascia, CPT code 21932 is designated for masses less than 5 cm, while 21933 is specifically for those measuring 5 cm or greater, highlighting the importance of accurate coding based on tumor size and location.