CPT® Code 21925

Soft tissue biopsy of the back or flank involves the extraction of a tissue sample from deeper layers of the skin and underlying structures. The term "soft tissue" encompasses various components, including muscles, tendons, fat, blood vessels, lymph vessels, nerves, and the tissues surrounding joints. This procedure is typically performed when there is a need to investigate a mass or lesion that may be present in these areas. Depending on the specific site and depth of the biopsy, the patient may receive local, regional, or general anesthesia, or conscious sedation to ensure comfort during the procedure. Prior to the biopsy, the skin over the targeted area is thoroughly cleansed to minimize the risk of infection. A surgical incision is then made, allowing the physician to carefully dissect through the layers of tissue down to the mass or lesion while taking precautions to avoid damaging any nearby blood vessels or nerves. Once the tissue sample is obtained, it is sent to a laboratory for histological evaluation, which is reported separately. After the sample is collected, the incision is closed using sutures to promote proper healing. It is important to note that for superficial biopsies, a different code, 21920, should be used, while 21925 is specifically designated for deeper tissue biopsies that require more extensive dissection of the overlying tissues.