CPT 21184 Reimbursement & Policy Benchmarks | OpenPayer

Summary & Overview

CPT 21184: Extensive Craniofacial Bone Reconstruction with Autologous Graft

CPT code 21184 represents extensive reconstruction of the upper face, forehead, and nasal sinus region using autologous bone graft material after removal of a benign skull tumor. This code captures a high-complexity craniofacial procedure combining resection-related reconstruction, often requiring multidisciplinary surgical teams and inpatient or advanced ambulatory surgical care. Nationally, accurate use of 21184 affects clinical documentation, operative coding, and payment for resource-intensive reconstructive services.

Key payers referenced in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Coverage and prior authorization policies among these payers can influence site-of-service decisions, documentation requirements, and claims adjudication for extensive craniofacial reconstruction.

Readers will find a concise overview of the clinical context for 21184, guidance on typical sites of service, common operative elements tied to the code, and what to expect in payer coverage patterns and administrative requirements. The publication summarizes benchmarks for coding and utilization where available and highlights policy considerations relevant to high-complexity reconstructive craniofacial surgery. Data not available in the input is noted where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare21184CPTcraniofacial-reconstructionautologous-bone-graftskull-tumor-resectionneurosurgeryfacial-plastic-surgery

Billing Code Overview

CPT code 21184 describes an extensive reconstructive procedure of the upper face, forehead, and nasal sinus area using autologous bone graft material harvested from another site in the patient’s body. The procedure is performed following removal of a benign (noncancerous) skull tumor and involves reconstruction of contiguous craniofacial bone structures.

Service type: Complex craniofacial bone reconstruction with autologous bone grafting following benign skull tumor resection

Typical site of service: Inpatient hospital or ambulatory surgical center with specialty craniofacial or neurosurgical capabilities

Clinical & Coding Specifications

Clinical Context

A 48-year-old patient presents with a slow-growing, benign skull tumor involving the frontal bone and adjacent upper facial skeleton, causing cosmetic deformity and pressure symptoms. Neurosurgery and craniofacial/plastic surgery teams coordinate care. The patient undergoes a planned resection of the noncancerous skull lesion under general anesthesia with neurosurgical exposure and tumor removal. After tumor excision and intraoperative assessment of the bony defect, the surgeon harvests autologous bone graft (for example, from the calvarium or iliac crest) and performs extensive reconstruction of the upper face, forehead, and paranasal sinus region to restore contour, protect intracranial contents, and reconstruct sinus walls. The clinical workflow includes preoperative imaging (CT/MRI), multidisciplinary operative planning, intraoperative neurosurgical and craniofacial reconstruction, postoperative imaging to confirm reconstruction integrity, inpatient monitoring for neurologic and wound complications, and staged outpatient follow-up with wound checks and possible revision for contour or functional issues.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work, time, and technical difficulty substantially exceed typical requirements for `21184`.

CPT 21181: Cranial Bone Reconstruction for External Benign Tumor

CPT-21255-ZYGOMATIC-ARCH-AND-GLENOID-FOSSA-RECONSTRUCTION-AUTOGRAFT

CPT 21255: Zygomatic Arch and Glenoid Fossa Reconstruction, Autograft

CPT-21196-MANDIBLE-RECONSTRUCTION

CPT 21196: Mandible Reconstruction, Body and Rami

CPT-21150-LEFORT-II-MIDFACE-RECONSTRUCTION

CPT 21150: LeFort II Midface Reconstruction

CPT-21230-AUTOGENOUS-RIB-CARTILAGE-GRAFT-FACE-RECONSTRUCTION

CPT 21230: Autogenous Rib Cartilage Graft for Facial Reconstruction

CPT-21125-MANDIBULAR-AUGMENTATION-WITH-IMPLANT

CPT 21125: Mandibular Augmentation with Implant

CPT-21210-FACIAL-BONE-GRAFTING-NOSE-UPPER-JAW-CHEEKS

CPT 21210: Facial Bone Graft for Nose, Upper Jaw, and Cheeks

CPT-21247-MANDIBULAR-CONDYLE-RECONSTRUCTION-AUTOGRAFT

CPT 21247: Mandibular Condyle Reconstruction Using Autologous Graft

CPT-21275-SECONDARY-ORBITOCRANIOFACIAL-REVISION

CPT 21275: Secondary Orbitocraniofacial Reconstruction Revision

CPT-21123-SLIDING-GENIOPLASTY-CHIN-AUGMENTATION-AUTOLOGOUS-BONE-GRAFT

CPT 21123: Sliding Genioplasty with Autologous Chin Augmentation

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Taxonomy Code	Specialty	Notes
`207S00000X`	Plastic Surgery	Craniofacial and reconstructive surgeons commonly perform complex upper facial bone reconstructions.
`2084P0800X`	Neurological Surgery	Neurosurgeons perform tumor resection and collaborate on calvarial and skull base reconstruction.
`2080P0207X`	Oral and Maxillofacial Surgery	May perform complex midface and sinus-related bony reconstruction in coordination with craniofacial teams.
`208000000X`	Otolaryngology (ENT)	Otorhinolaryngologists with skull base expertise participate in sinus wall reconstruction and airway/sinus function management.
`363L00000X`	Anesthesiology	Provides general anesthesia and perioperative pain and airway management for complex craniofacial procedures.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`D16.0`	Benign neoplasm of bones of skull and face	Directly indicates a noncancerous skull tumor prompting resection and reconstruction of the upper face and forehead.
`D16.2`	Benign neoplasm of bones of other parts of skull	Relevant when benign lesions involve cranial vault bones requiring reconstruction.
`Q75.0`	Craniosynostosis	May require cranial vault and forehead reconstruction; relevant when congenital skull deformities need extensive bone reconstruction.
`M85.6`	Pathological fracture of skull and facial bones	Indicates bony compromise that may necessitate reconstruction with bone grafting.
`S02.0X-`	Fracture of skull and facial bones (unspecified subgroup)	Acute traumatic defects of the upper face/forehead that may require reconstructive bone grafting after debridement and fixation.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`61520`	Resection or excision of infratentorial tumor, complex	Performed when neurosurgical resection of a skull/skull base lesion is required prior to reconstruction; represents the tumor removal component.
`62120`	Craniectomy or craniotomy, except for posterior fossa, for excision of tumor most commonly intradural	Represents cranial access and tumor resection steps that precede reconstruction of bony defects addressed by `21184`.
`20930`	Allograft or autograft for spine or other major structural support (includes obtaining graft)	Used when significant structural bone grafting is required; documents graft harvest and application though specific graft codes may vary.
`21210`	Reconstruction of mandible or facial bones without internal rigid fixation, segmental osteotomy	Related facial bone reconstruction codes for adjacent anatomic work; used when additional facial skeletal repair is performed.
`15734`	Muscle, myocutaneous, or fasciocutaneous flap with microvascular anastomosis	Performed when soft tissue coverage or complex flap reconstruction is required in conjunction with bony reconstruction to achieve wound closure and contour.

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