CPT 21040: Mandible Benign Tumor Enucleation/Curettage

CPT code 21040 identifies the surgical enucleation and/or curettage of benign tumors of the mandible (lower jaw). This code captures a focused oral and maxillofacial procedure used to remove noncancerous mandibular lesions as either an intact mass (enucleation) or by scraping diseased tissue (curettage). Nationally, proper coding of this procedure affects claims processing, clinical documentation, and utilization tracking for surgical and dental specialties performing jaw surgery.

Key payers addressed in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, guidance on typical sites of service, and a summary of the billing code’s role in reimbursement workflows. The publication covers benchmarking and coverage considerations, common modifier usage patterns (listed separately), and where CPT code 21040 sits relative to related oral and maxillofacial procedures.

Intended for billing managers, clinical coders, and policy analysts, the summary provides operational clarity on documentation elements that support claims and the types of clinical encounters that generate this code. Data not available in the input is noted where applicable in detailed sections.

Billing Code Overview

CPT code 21040 describes surgical removal of benign (noncancerous) tumors of the mandible by enucleation and/or curettage. Enucleation refers to removal of the entire lesion as a single mass; curettage denotes scraping of diseased tissue with a curette.

Service type: Surgical excision of benign mandibular tumor (enucleation/curettage)

Typical site of service: Hospital operating room or ambulatory surgical center; oral and maxillofacial surgery clinic with operative capability.

Clinical Context

A 42-year-old patient presents to an oral and maxillofacial surgery clinic with progressive swelling and localized pain in the posterior mandible. Imaging (panoramic radiograph and CT) demonstrates a radiolucent lesion consistent with a benign odontogenic cystic tumor such as an odontogenic keratocyst or ameloblastoma confined to the mandible. After preoperative evaluation and informed consent, the patient is scheduled for enucleation and curettage of the benign mandibular tumor under general anesthesia. The clinical workflow includes preoperative imaging and labs, anesthesia evaluation, intraoperative removal of the lesion by enucleation and curettage with hemostasis and irrigation, specimen submission for pathology, postoperative monitoring in PACU, and discharge with wound care and outpatient follow-up for radiographic surveillance and potential reconstruction if needed.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	When the procedure requires substantially greater work than usual due to complexity (extensive dissection, abnormal anatomy, or large lesion).
`23`	Unusual anesthesia	When general anesthesia is required for a procedure normally done with local/regional anesthesia due to patient condition.

Taxonomy Code	Specialty	Notes
`207G00000X`	Oral and Maxillofacial Surgery	Primary specialty performing mandibular tumor enucleation and curettage.
`207K00000X`	Otolaryngology — Head & Neck Surgery	May perform procedures involving mandible and adjacent structures.
`2080P0222X`	Plastic and Reconstructive Surgery	Involved if reconstruction of mandible or soft tissue coverage is required.
`207L00000X`	Oral Surgery (Dentists)	Dental specialists who manage intraoral lesions and minor mandibular procedures.
`208600000X`	General Surgery	Occasionally involved for complex head and neck tumors requiring multidisciplinary care.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`K07.6`	Deformity of jaw	May be associated with benign mandibular tumors that distort jaw anatomy and require surgical correction.
`K09.8`	Other cysts of oral region, not elsewhere classified	Includes odontogenic cysts that may present as benign mandibular lesions addressed by enucleation and curettage.
`K10.2`	Alveolar osteitis (dry socket)	A postoperative complication to consider in mandibular surgery recovery planning.
`D16.1`	Benign neoplasm of mandible	Primary diagnosis indicating a benign bony tumor of the mandible treated by enucleation/curettage.
`M27.8`	Other dentofacial anomalies, not elsewhere classified	Reflects associated dentofacial changes that can coexist with mandibular lesions and affect surgical planning.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`21045`	Excision of benign tumor or cyst of mandible requiring partial ostectomy, with or without local flap	Used when lesion removal requires partial ostectomy rather than simple enucleation/curettage; may be an alternative or follow-up if more bone removal is needed.
`40820`	Removal of lesion of oral soft tissue (except tonsillectomy and adenoidectomy) — single lesion	Performed when soft tissue extension of the mandibular lesion requires excision of adjacent intraoral soft tissue.
`40490`	Biopsy of oral mucosa, single lesion	Diagnostic biopsy code used preoperatively or intraoperatively when tissue sampling precedes definitive enucleation.
`88305`	Level IV surgical pathology, gross and microscopic examination	Used for pathology processing of the resected specimen to establish definitive histologic diagnosis.
`41899`	Unlisted procedure, dentoalveolar structures	Used when a specific dentoalveolar procedure related to the mandible is performed that has no direct CPT match.

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Summary & Overview