Summary & Overview
CPT 29046: Body Cast Application for Trunk and Spine Immobilization
CPT code 29046 represents the application of a body cast extending from the shoulders to the hips and down both thighs to immobilize the trunk and spine after surgical correction of congenital spinal deformity or repair of traumatic spine and pelvic injuries. This procedure is used when circumferential stabilization of the thoracic and lumbar regions is required in the immediate postoperative or acute inpatient setting. Nationally, proper coding of this service affects hospital and surgical facility case mix, postoperative care records, and accurate capture of orthopaedic immobilization services.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, United Healthcare, and Medicare. The publication summarizes how CPT code 29046 is defined, common clinical contexts for use, and payer coverage patterns. Readers will find benchmarks for service categorization, comparisons to related upper-extremity and long-arm immobilization codes, and clinical context relevant to orthopaedic and trauma surgical teams.
The report highlights typical sites of service, the clinical scenarios prompting a body cast (postoperative correction of congenital deformity and repair of traumatic spine or pelvic damage), and where this code sits relative to other immobilization procedures. Data not available in the input: specific payer reimbursement rates and utilization metrics. The content is intended to support coding accuracy, clinical documentation alignment, and payer discussions at a national level.
Billing Code Overview
CPT code 29046 describes the application of a body cast that limits motion of the trunk and spine following surgical correction of a congenital spinal deformity or repair of traumatic injury to the spine and pelvis. The cast extends from the shoulders to the hips and down both thighs, providing circumferential immobilization of the thoracic and lumbar regions.
Service type: Orthopaedic immobilization / postoperative external immobilization
Typical site of service: Inpatient hospital or ambulatory surgical center, provided immediately postoperatively or during the acute postoperative inpatient stay when trunk and spinal immobilization is required.
Clinical & Coding Specifications
Clinical Context
A teenage patient is admitted following a motor vehicle collision with multiple thoracolumbar and pelvic injuries. After surgical stabilization of a thoracic spinal fracture and fixation of a pelvic ring injury, the orthopaedic trauma surgeon applies a body cast extending from the shoulders to the hips and down both thighs to immobilize the trunk and spine during the early postoperative healing period. The patient is managed on the orthopaedic inpatient service; cast application occurs in the operating room under sterile conditions with the patient still under anesthesia. Post-application workflow includes neurovascular checks of the lower extremities, documentation of cast fit and skin protection, imaging to confirm alignment, and scheduled outpatient follow-up for cast removal or transition to a brace. Typical payors involved include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, BUCA, and Medicare.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when work, time, or complexity substantially exceeds typical for body cast application due to complicated wounds or deformity correction. |
23 | Unusual anesthesia |