Summary & Overview
CPT 61559: Cranial Vault Remodeling for Craniosynostosis
CPT code 61559 represents open cranial vault remodeling for treatment of craniosynostosis, a pediatric condition in which one or more cranial sutures fuse prematurely. The procedure involves removal and reshaping of cranial bone to restore normal skull contours and, where indicated, to alleviate raised intracranial pressure. Nationally, this code captures high-complexity neurosurgical and craniofacial reconstruction services typically delivered in inpatient tertiary care settings and is relevant for hospital billing, payer medical policy, and resource planning.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context, typical sites of service, and common modifiers associated with surgical complexity. The publication also summarizes benchmarks and payer coverage considerations relevant to this service line, highlights coding and documentation elements that affect claim adjudication, and outlines where policy updates or authorization requirements commonly arise. The focus is national in scope and intended for revenue cycle, coding professionals, and clinical leaders seeking a concise reference for billing and policy dialogue around cranial vault remodeling for craniosynostosis.
Billing Code Overview
CPT code 61559 describes a cranial vault remodeling procedure in which the surgeon incises the skull, removes portions of the cranium, and reshapes the cranial bones to correct prematurely fused cranial sutures (craniosynostosis). This neurosurgical and craniofacial reconstruction procedure is performed to restore an anatomically appropriate skull shape and relieve associated intracranial pressure or deformity.
Service type: Open cranial vault remodeling / craniofacial reconstructive surgery
Typical site of service: Inpatient hospital operating room, often within tertiary pediatric neurosurgery or craniofacial surgery programs. Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 7-month-old infant presents with a visibly misshapen skull and asymmetric forehead noted since birth, with progressive prominence of the coronal suture and signs of restricted cranial growth on physical exam. Neurodevelopmental screening reveals a mild delay in gross motor milestones and parents report poor head circumference growth compared with normative curves. Imaging with non-contrast CT of the head with 3D reconstruction demonstrates premature fusion of the right coronal suture consistent with unilateral coronal craniosynostosis. After multidisciplinary review by pediatric neurosurgery, craniofacial surgery, and anesthesia, the care team schedules an open cranial vault remodeling procedure to release the fused suture, remove and reshape bone segments, and reconstruct the calvarium to an anatomically appropriate contour.
The clinical workflow includes preoperative evaluation (history, exam, hematology, crossmatch if needed), anesthesia assessment, perioperative prophylactic antibiotics, intraoperative monitoring and blood management, the open cranial vault remodeling procedure (61559) performed under general anesthesia with possible intraoperative blood transfusion and craniofacial plating, immediate postoperative monitoring in a pediatric intensive care unit for airway and hemodynamic management, and outpatient follow-up with imaging and developmental surveillance. Care coordination involves pediatric neurosurgery, craniofacial/plastic surgery, pediatric anesthesiology, nursing, and case management for postoperative rehabilitation and family education.
Coding Specifications
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