CPT code 22590 denotes a posterior arthrodesis that fuses the second cervical vertebra to the base of the cranium using bone graft material. This technically complex spinal fusion targets severe cervical pathology — including disk herniation, stenosis, and traumatic instability — where permanent stabilization of the craniovertebral junction is required. The code matters nationally because it reflects high-acuity surgical care with implications for perioperative resource use, device and graft utilization, and postoperative rehabilitation.

Key payers examined include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find clinical context about the procedure and typical sites of service, plus payer-focused content: coverage and coding considerations, common modifiers used in claims, and expected documentation elements. The publication also provides benchmark-oriented material such as utilization patterns, payment drivers, and areas where policy updates or prior authorization rules commonly affect access and billing. Practical takeaways include coding boundaries for fusion at the craniovertebral junction and factors that influence claim adjudication for this high-complexity operative service.

Data not available in the input for specific associated taxonomies, ICD-10 diagnoses, related codes, and service-line billing details.