After a recent class action settlement Aetna has revised Clinical Policy Bulletin #0591 – Intervertebral Disc Prosthesis. The review dated 2/8/2023 now allows for FDA approved total disc implant (CPT code 22857) for lumbar degenerative disc disease (ICD codes M51.36-M51.37) at one level. The patient must meet certain criteria as listed in the policy. Previously this procedure was considered experimental/investigational. The policy can be found at