Summary & Overview

CPT 21049: Partial Maxillectomy for Benign Maxillary Tumor

CPT code 21049 denotes an open surgical partial maxillectomy to remove a benign tumor of the maxilla, using an extraoral osteotomy to access and excise a fast-growing or locally destructive lesion. This procedure is clinically significant because tumors of the maxilla can threaten oral function, facial structure, and airway integrity, and may require complex reconstructive planning. Nationally, billing for such complex head and neck surgeries affects hospital surgical volume, specialist reimbursement, and preauthorization practices.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical indications and the typical surgical setting, along with payer-specific coverage considerations, common modifier usage, and related billing practice notes. The publication also summarizes benchmarks for service lines that manage maxillary tumor excisions and highlights relevant policy updates that can affect claim adjudication.

This resource is intended for coding professionals, surgical providers, and policy analysts seeking a clear, national-level briefing on CPT code 21049, its clinical context, and the reimbursement landscape that commonly surrounds major head and neck oncologic and non-oncologic resections.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 21049maxillectomymaxillary tumorhead and neck surgerysurgical oncologyoral and maxillofacial surgeryoperative procedurehospital outpatientinpatient surgery

Billing Code Overview

CPT code 21049 describes an open surgical procedure to remove a benign (noncancerous) tumor of the maxilla (upper jaw). The procedure involves an extraoral osteotomy — cutting into the maxillary bone — followed by a partial maxillectomy to excise a rapidly growing or locally destructive tumor.

Service type: Open surgical tumor excision involving bone (partial maxillectomy)
Typical site of service: Outpatient surgical center or inpatient hospital operating room

Clinical & Coding Specifications

Clinical Context

A 48-year-old patient presents with a rapidly enlarging, painless mass of the left maxilla causing facial asymmetry, nasal obstruction, and intermittent epistaxis. Imaging (CT and MRI) demonstrates a expansile, well-circumscribed lesion centered in the left maxillary antrum with cortical thinning and partial invasion of the adjacent alveolar process. An incisional biopsy identifies a benign but locally aggressive neoplasm (e.g., odontogenic tumor or benign fibro-osseous lesion) that is threatening orbital floor integrity and dental roots. After multidisciplinary review, the otolaryngology-head & neck surgery team schedules an open extraoral osteotomy with partial maxillectomy to achieve tumor extirpation with clear margins.

Preoperative workflow includes history/physical, dental and ophthalmologic assessments, anesthesia evaluation, cross-sectional imaging, and surgical planning for possible reconstruction. Intraoperative care involves general endotracheal anesthesia, a transfacial (extraoral) approach to the maxilla, osteotomies to mobilize involved bone, removal of the tumor-bearing segment (partial maxillectomy), hemostasis, and immediate reconstruction as indicated (local flap, obturator placement, or microvascular free tissue transfer). Postoperative workflow includes inpatient monitoring for airway, bleeding, and infection, pain control, dental/oral care, and follow-up imaging and pathology review to confirm margins and guide any further therapy.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services

Taxonomy Code	Specialty	Notes
`206E00000X`	Otolaryngology (ENT)	Primary specialty performing maxillary tumor resections and partial maxillectomy.

ICD-10 Code	Description	Clinical Relevance
`D18.0`	Hemangioma and lymphangioma, any site	Vascular benign lesions that can affect the maxilla and require resection when locally destructive.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`21049`	Resection of benign tumor; maxilla, partial maxillectomy via extraoral osteotomy	Principal procedure for removal of a benign, locally aggressive maxillary tumor using an extraoral approach and osteotomy.

21046 | Resection of benign tumor; maxilla, partial maxillectomy, intraoral approach | Alternative approach when the tumor can be accessed intraorally without an extraoral osteotomy; may be considered for smaller, more medial lesions.

42450 | Excision of lesion of lip; full-thickness | May be performed concurrently if tumor involves the lip or requires lip excision as part of resection or reconstruction.

21420 | Genioplasty; osteotomy for advancement or reduction (mandible) | Not directly part of maxillectomy but listed among maxillofacial osteotomies; included when concurrent mandibular osteotomy or contouring is required.

21195 | Reconstruction, midface, with free tissue transfer (includes microvascular anastomosis) | Used when immediate complex midface reconstruction with free flap is performed following partial maxillectomy.

21087 | Reconstruction of maxilla; with obturator or prosthetic device | Related to prosthetic rehabilitation and obturator placement after resection to restore oral-nasal separation.

69990 | Microsurgical techniques, requiring use of an operating microscope | May be reported when microvascular anastomosis is required for free flap reconstruction following maxillectomy.

99100 | Anesthesia for patient of extreme age, under 1 year or over 70 years, for use with other anesthesia codes | May be applicable for age-related anesthesia considerations during preoperative billing.

00630 | Anesthesia for procedures on the maxilla or mandible | Common anesthesia code used in conjunction with operative reporting for maxillary surgery.

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