Summary & Overview
CPT 22556: Thoracic Spinal Fusion via Lateral Transthoracic Approach
CPT code 22556 represents an open thoracic spinal fusion performed via a lateral transthoracic approach to permanently join two vertebrae and relieve persistent pain from herniated or bulging discs or other thoracic spinal pathology. This operative procedure is clinically significant because it addresses complex thoracic spine disease that may not respond to conservative care and often involves hospital-based surgical resources and postoperative management.
Key payers discussed in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a national overview of clinical context for use of CPT code 22556, typical sites of service, and the common procedural considerations that drive billing and utilization. The publication presents benchmarks and coverage patterns, highlights policy and coding guidance relevant to thoracic spinal fusion, and provides practical coding context such as typical service setting and procedure intent. Where specific data elements are not present in the input, the text notes: "Data not available in the input."
Billing Code Overview
CPT code 22556 describes an arthrodesis (spinal fusion) of the thoracic spine performed through a lateral transthoracic approach. The surgeon makes an incision in the side of the chest to access the upper back, removes disc material as needed, and permanently joins two vertebrae to relieve persistent pain from a herniated or bulging disc or other spinal conditions.
Service type: Spinal fusion surgery (thoracic), lateral transthoracic approach
Typical site of service: Inpatient hospital or ambulatory surgical center (operating room)
Clinical & Coding Specifications
Clinical Context
A 58-year-old patient with progressive thoracic radiculopathy and disabling axial back pain refractory to conservative care (physical therapy, epidural steroid injections, and medications) presents for planned thoracic spinal fusion via a thoracotomy approach. Preoperative imaging (MRI and CT) demonstrates a symptomatic herniated or degenerative disc at T7–T8 with segmental instability and neural compression. The surgical team discusses risks/benefits and obtains informed consent. In the operating room under general anesthesia the surgeon makes a lateral chest incision, performs a thoracotomy to access the thoracic spine, removes the offending disc material, prepares the endplates, places interbody graft/cage, and secures segmental fixation as indicated to achieve arthrodesis between the involved vertebral levels. Intraoperative neuromonitoring and fluoroscopy are commonly used. The typical site of service is an inpatient hospital operating room with postoperative recovery in the PACU and admission to a surgical ward for pain control, pulmonary care, and mobilization. Discharge planning includes activity restrictions, wound care instructions, and outpatient follow-up with the spine surgeon for radiographic fusion surveillance.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier | Standard reporting when no modifier applies |