Summary & Overview
CPT 21045: Resection of Malignant Tumor of Mandible (Mandibulectomy)
CPT code 21045 denotes open surgical resection of a malignant tumor of the mandible, performed via intraoral or extraoral approaches and, when indicated, radical dissection of surrounding vascular and lymphatic tissues. This code captures high-complexity surgical oncology of the lower jaw with implications for operative planning, pathology evaluation, and potential reconstruction. Nationally, procedures coded with 21045 are relevant to cancer care networks, hospital surgical services, and payer coverage policies for complex head and neck oncology.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context and service setting for 21045, plus what to expect in related billing and policy considerations. The publication reviews typical sites of service, the surgical nature of the code, and common administrative elements associated with complex oncologic mandible resections.
This summary is intended to orient clinicians, coding professionals, and policy analysts to the clinical meaning and administrative relevance of CPT code 21045. Data not available in the input will be identified where applicable in later sections.
Billing Code Overview
CPT code 21045 describes the open surgical removal of a malignant tumor of the mandible (lower jaw bone). The procedure may be performed via an intraoral approach (through the mouth) or an extraoral approach (through the skin) and can include radical dissection when an extensive tumor requires removal of surrounding blood supply and lymphatic tissue for pathological analysis.
Service type: Surgical oncology — mandibulectomy / tumor resection of the mandible
Typical site of service: Operating room or surgical suite, with care possibly initiated in an outpatient surgical center or inpatient hospital depending on extent of disease and reconstruction needs.
Clinical & Coding Specifications
Clinical Context
A 62-year-old male presents with a progressively enlarging, painful mass of the left mandible confirmed by biopsy as squamous cell carcinoma of the jaw. Imaging (CT and MRI) demonstrates cortical destruction of the left mandibular body and possible regional lymph node involvement. The surgical team schedules an open mandibulectomy to remove the primary tumor with adequate margins, combined with neck dissection for regional lymphadenectomy. The procedure may be performed via an intraoral or extraoral approach depending on tumor extent. The perioperative workflow includes preoperative anesthesia evaluation, staging imaging, informed consent discussing risks (bleeding, infection, nerve injury, need for reconstruction), possible placement of a tracheostomy if airway compromise is anticipated, intraoperative frozen section pathology, and coordination with maxillofacial prosthetics or reconstructive surgery for immediate or delayed mandibular reconstruction. Postoperative management includes intensive monitoring for airway patency, pain control, wound care, nutrition planning (enteral feeding if oral intake is inadequate), adjuvant radiation or chemotherapy planning if indicated, and pathology review to determine margin status and nodal involvement for staging and further therapy planning.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when the work required to perform the mandibulectomy is substantially greater than typical due to complexity, extensive dissection, or unexpected intraoperative findings. |