The cost of a single-level spinal fusion surgery depends factors such as the state in which the surgery is performed, the severity of the injury and the recovery time spent in the hospital. Spine-health gives a general range, not paid by insurance, of $90,000 to $160,000, as of 2015.
It is important to note that this is the price before insurance pays any of the cost. This means that there are more layers of variance on top of the already largely varying cost, since any person's insurance can decide to cover completely different amounts of the bill. Spinal fusion in general, however, is an expensive surgery.