CPT® Code 42842

The CPT® Code 42842 refers to a surgical procedure known as radical resection of the tonsil, tonsillar pillars, and/or retromolar trigone, performed without closure. This procedure is primarily indicated for the treatment of primary malignant neoplasms located in the oropharynx, specifically in the tonsils, tonsillar pillars, and retromolar trigone areas. The tonsils, particularly the palatine tonsils, are clusters of lymphoid tissue located laterally at the back of the throat, nestled between the anterior and posterior tonsillar pillars, which are formed by the palatoglossus and palatopharyngeus muscles, respectively. The retromolar trigone is a small mucosal region situated behind the wisdom teeth. During the procedure, the extent of the tumor is assessed through various diagnostic studies, including radiographic imaging and biopsies, to determine the precise area that requires resection. The surgical approach may involve either an oral route or a neck incision, depending on the tumor's location and extent. The surgeon excises the tumor along with a margin of healthy tissue to ensure complete removal of malignant cells. To confirm the absence of cancerous tissue, frozen sections of the excised tissue are sent for laboratory analysis. If malignant tissue is detected, further excision is performed until clear margins are achieved. Notably, in the case of CPT® Code 42842, the surgical site is intentionally left open to heal by secondary intention, contrasting with other codes that involve closure techniques using local or distant flaps.