CPT® Code 19301

Partial mastectomy, also known as lumpectomy, tylectomy, quadrantectomy, or segmentectomy, is a surgical procedure aimed at removing a cancerous lesion or a lesion suspected of being cancerous from the breast. This procedure involves making an incision over the identified lump or mass, which is then visually inspected to confirm its characteristics. The surgeon excises the lump or mass along with a margin of healthy tissue surrounding it to ensure complete removal of any potentially malignant cells. The excised tissue is subsequently sent to a laboratory for histological analysis to determine the nature of the lesion. During the procedure, the surgical site and the surrounding breast tissue are carefully examined for any additional lesions that may require attention. In cases where axillary lymphadenectomy is indicated, an incision is made in the lowest area of the axilla to access the lymph nodes. The procedure includes identifying and dissecting the axillary vein from surrounding tissues, while also protecting the axillary neural structures. Typically, 15 to 25 axillary lymph nodes are excised from beneath the axillary vein and along the nerves and muscles of the axilla. After ensuring that all cancerous or suspicious tissue has been removed, a drain is placed to prevent fluid accumulation, and the surgical wound is closed. It is important to use CPT® Code 19301 when the partial mastectomy is performed without axillary lymphadenectomy, and CPT® Code 19302 when the procedure includes axillary lymphadenectomy.