Summary & Overview
CPT 42842: Tonsil and Adjacent Structure Ablative Resection
CPT code 42842 denotes extensive ablative surgery of the tonsils and adjacent oral structures, commonly used to excise malignant lesions that involve the tonsils, tonsillar pillars, retromolar trigone and, when necessary, portions of the maxilla or mandible. The procedure leaves a large surgical defect that is intentionally deferred for later grafting, which has implications for operative planning, resource use and postoperative care. Nationally, this code is significant because it captures high-complexity head and neck oncologic resections performed in hospital surgical settings and often associated with inpatient stays.
Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare and Medicare. Readers will find a concise account of the clinical context for CPT code 42842, the typical site of service and service type, and what to expect from documentation and care pathways tied to staged reconstruction. The publication summarizes common billing modifiers and typical payer coverage patterns where available, outlines relevant coding relationships and highlights operational considerations such as perioperative care, potential need for multidisciplinary surgical teams, and impact on length of stay. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 42842 describes a surgical procedure for extensive removal of tonsillar tissue and adjacent structures when necessary to treat malignancy. The surgeon removes the tonsils, tonsillar pillars, and/or the retromolar trigone; portions of the maxilla or mandible may also be excised if affected. The resulting large wound is intentionally left open for delayed grafting.
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Service type: Major head and neck ablative surgery for oncologic resection
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Typical site of service: Hospital operating room, often with inpatient admission due to the extent of resection and need for staged reconstruction
Clinical & Coding Specifications
Clinical Context
A 62-year-old male presents with a rapidly enlarging ulcerated mass involving the tonsillar region and adjacent retromolar trigone confirmed by biopsy as squamous cell carcinoma. Preoperative staging includes head and neck CT and direct laryngoscopy with biopsy under anesthesia. The head and neck surgical oncology team plans a wide radical excision of the tonsils, tonsillar pillars and involved retromolar trigone with resection of portions of the mandibular alveolus and retromolar maxillary bone as needed. Because the surgical defect is extensive, the wound is intentionally left open for delayed reconstruction with a free flap or split-thickness skin graft at a subsequent reconstructive procedure. The procedure is performed in an operating room under general endotracheal anesthesia with intraoperative pathology consultation for margin assessment. Postoperative care includes airway monitoring, pain control, speech and swallow evaluation, and coordination with medical oncology and radiation oncology for adjuvant therapy as indicated.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when the procedure requires substantially greater work, time, or technical difficulty than typical (document rationale). |
26 |