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CPT 00604: Anesthesia for Cervical Spine and Cord Procedure, Sitting Position
CPT code 00604 identifies anesthesia services for procedures on the cervical spine and spinal cord performed with the patient in a sitting position. This anesthesia designation is significant because positioning and the anatomic region present specific physiologic and airway-management challenges that can affect resource use, staffing and perioperative risk. Nationally, use of this code signals cases requiring specialized anesthetic plans and monitoring in operative settings.
Key payers included in the coverage analysis are Aetna, Blue Cross Blue Shield, Cigna Health, United Healthcare and Medicare. Readers will find a concise description of the clinical context for 00604, comparisons to adjacent spine anesthesia codes, and the typical site of service for these procedures. The publication outlines common billing considerations, associated diagnosis contexts, and related anesthesia code groupings to aid coding accuracy and policy interpretation at a national level.
The content that follows provides benchmarks, clinical context and coding relationships relevant to CPT code 00604, enabling clinicians, billers and policy analysts to understand where this code fits within spine anesthesia services and payer coverage landscapes.
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Billing Code Overview
CPT code 00604 describes anesthesia services provided for a patient undergoing a procedure on the cervical spine and cord while positioned sitting. The service encompasses pre‑procedure evaluation, intraoperative anesthetic management, and immediate post‑procedure care tied to the surgical event.
Service type: Anesthesia for cervical spine and spinal cord procedures (sitting position)
Typical site of service: Hospital operating room or ambulatory surgical center
National Reimbursement Benchmarks
National commercial rates for CPT 00604 cluster around BUCA’s average commercial rate of $68.70, with variation across individual carriers. Blue Cross Blue Shield shows the highest upper-end observation at $184.90 and a median of $58.80, while Cigna centers higher with a median of $85.90 and a mean of $92.90. UnitedHealth Group and Aetna have lower medians ($64.00 and $48.00 respectively) with means of $67.40 and $56.60, indicating more concentration nearer the mid-range for those payers.
Dispersion measured as the interquartile range (P75 minus P25) highlights differences in rate spread: Blue Cross Blue Shield has a range of $40.60, Cigna $54.80, UnitedHealth Group $29.00, Aetna $24.70, and BUCA $37.60. Cigna therefore has the widest IQR at $54.80, signaling the greatest middle-50% variability, while Aetna is the tightest at $24.70, indicating the most consistent middle-range commercial payments.