The average cost of spinal fusion surgery without insurance is between $80,000 and $150,000 as of 2015, according to CostHelper Health. If insurance covers the procedure, the patient can pay from $200 to $2,000, or up to the out-of-pocket maximum, as of 2015.
Lumbar spinal fusion surgery joins two vertebrae in the lower back to treat fractures or correct the effects of other surgery on the back, says WebMD. In some of these surgeries, the surgeon takes bone from the pelvis to make a connection between the two vertebrae. In other cases, metal implants are used to hold the two vertebrae together.