Frequently consultants have no more to go on than the doctor's bills and diagnostic codes. Moreover, the consultant would charge the insurer more to review additional documents. We might also cynically suppose that the reviewer's opinions might not be as harsh if these additional records were reviewed. If you can speak with the reviewer, you may be allowed additional treatment time. Also, check with your state association.
Some states require that file reviewers practice in the state.
Write a rebuttal letter to the carrier. It is common knowledge that spondylosis does not necessarily cause pain, yet the condition is seen in more than 80 percent of the population in your patient's age group. If the carrier or the reviewer has evidence that the patient has indeed had chronic or serious prior neck problems, their argument may have some validity. If not, I'd certainly point that out. Bogdan Radanov and other authors have shown that patients with spondylosis fare worse than those without it in whiplash accidents.