Summary & Overview
CPT 21047: Excision of Benign Mandibular Mass with Partial Mandibulectomy
CPT code 21047 captures surgical excision of a benign mandibular mass with removal of a portion of the lower jaw via an extraoral (skin) approach. This procedure is clinically significant when masses such as aggressive cysts or benign tumors threaten mandibular integrity or function, and it often requires coordination among surgical, anesthesia, and post‑acute care teams. Nationally, accurate coding of complex head and neck procedures is important for appropriate clinical documentation, resource allocation, and payment accuracy.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an explanation of the clinical service and typical sites of care, common billing considerations relevant to surgical head and neck procedures, and benchmarking context where available. The publication summarizes charge and reimbursement benchmarks, common modifier usage provided in the input, and clinical context that influences coding and service lines. It also outlines implications for documentation and claims processing that affect payment outcomes.
The content is intended for clinicians, coding professionals, and policy analysts seeking a concise reference on CPT code 21047, including clinical scope, payer coverage landscape, and the types of operational and documentation factors that commonly influence claims for partial mandibulectomy procedures.
Billing Code Overview
CPT code 21047 describes excision of a benign mass of the mandible (lower jaw bone) that requires removal of a portion of the jaw due to aggressive growth or destructive behavior. The procedure is performed via an extraoral approach, with the surgeon accessing the mandible through an incision in the skin of the face or neck.
Service type: Surgical excision of mandible mass with partial mandibular resection
Typical site of service: Operating room or ambulatory surgical center, with a likely inpatient or outpatient surgical admission depending on clinical complexity and reconstruction needs.
Clinical & Coding Specifications
Clinical Context
A 48-year-old patient presents with a progressively enlarging, radiographically evident mandibular cyst causing cortical thinning, tooth displacement, and intermittent pain. After imaging (panoramic radiograph and CT) confirms an expansile, benign-appearing lesion centered in the body of the mandible with risk of pathologic fracture, the oral and maxillofacial surgery team schedules excision of the lesion with partial mandibulectomy via an extraoral approach. The preoperative workflow includes informed consent, medical clearance, anesthesia evaluation (general endotracheal anesthesia), and planning for possible reconstruction. Intraoperatively, the surgeon makes a skin incision (submandibular or transfacial), dissects to the mandible, excises the cystic mass and involved segment of mandibular bone, achieves hemostasis, and sends specimens for pathology. Postoperative care includes airway monitoring, pain control, antibiotics as indicated, wound care, and follow-up imaging and clinic visits to evaluate healing and consider definitive reconstruction or dental rehabilitation if needed. Typical site of service: hospital outpatient department or inpatient operating room depending on extent and reconstruction plan. Service type: surgical extraoral partial mandibulectomy for benign mandibular mass.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when intraoperative work is substantially greater than typical for 21047 due to complexity or extensiveness. |
23 | Unusual anesthesia | Use when general anesthesia is contraindicated and an unusual anesthesia circumstance is documented (rare for this procedure). |
26 | Professional component | Use if billing only the professional surgical interpretation when technical services billed separately (rare for standalone surgery). |
50 | Bilateral procedure | Use if identical procedures are performed on both mandibular sides (uncommon for 21047). |
51 | Multiple procedures | Use when 21047 is performed with additional distinct surgical procedures during the same operative session. |
52 | Reduced services | Use if the procedure is started but not completed or is substantially reduced. |
53 | Discontinued procedure | Use when the procedure is terminated due to extenuating circumstances or patient condition. |
54 | Surgical care only | Use when another provider bills for pre- and postoperative care and the surgeon bills only the intraoperative component. |
55 | Postoperative management only | Use when the surgeon provides only postoperative care and did not perform the operation. |
62 | Two surgeons | Use when two surgeons of different specialties work together as primary surgeons performing distinct portions of 21047. |
63 | Procedure performed on infants <4 kg | Not typically applicable but included when patient weight criteria met. |
78 | Unplanned return to OR | Use when the patient requires an unplanned return to the operating room for a related procedure following the original 21047. |
79 | Unrelated procedure or service by the same physician during the postoperative period | Use when an unrelated procedure is performed during the global period (note: 79 is not in provided list; excluded). |
80 | Assistant surgeon | Use when an assistant surgeon (e.g., another oral maxillofacial surgeon) assists during 21047. |
AS | Physician assistant, nurse practitioner, or clinical nurse specialist services | Use when an advanced practice clinician performs services incident to the surgeon per payer policy. |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| 207G00000X | Oral and Maxillofacial Surgery | Primary specialty performing mandibulectomy and mandibular lesion excision. |
| 2080P0206X | Otolaryngology (Head & Neck Surgery) | May perform surgical access and resection for complex head and neck or facial skeletal lesions. |
| 207L00000X | Plastic and Reconstructive Surgery | Involved when reconstruction or microvascular free flap is required following mandible resection. |
| 208100000X | General Surgery | May be involved in multidisciplinary head and neck care in some settings. |
| 363LP0808X | Anesthesiology | Provides general endotracheal anesthesia for the procedure. |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
K09.8 | Other cysts of the oral region | Represents mandibular cysts that may necessitate excision and partial mandibulectomy. |
K10.2 | Other cysts of the jaws | Includes odontogenic cysts of the mandible requiring surgical removal. |
D16.0 | Benign neoplasm of mandible | Benign tumors of the mandible (e.g., ameloblastoma) that may require segmental resection. |
M27.2 | Other disorders of jaw | Covers structural or destructive mandibular conditions prompting partial mandibulectomy. |
C41.2 | Malignant neoplasm of mandible | Included for surgical planning when malignancy is suspected preoperatively and later ruled out; histopathology crucial (note: if malignancy confirmed, malignant-specific codes used). |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
21046 | Excision, benign tumor or cyst, mandible; intraoral approach | Alternative approach for lesions accessible through the mouth; contrasted with 21047 extraoral approach. |
21048 | Resection, mandible, segmental; with immediate reconstruction | Used when mandibulectomy is performed with immediate reconstruction, including plating or grafting, following resection. |
21445 | Open treatment of mandibular fracture, with or without fixation; complicated (e.g., comminuted) | May be performed if pathological fracture is present or fixation is required after segmental resection. |
20969 | Allograft, morselized or placement of bone void filler | May be used when bone grafting or void filling is required as part of reconstruction after lesion excision. |
20860 | Bone graft, mandible; iliac crest, free graft | Applied when autologous bone grafting is used for mandibular reconstruction following resection. |