Alfreda, it seems that you know this much so far: When anesthesia is done for dental work, it must be billed to medical insurance, not dental insurance. It is billed to medical insurance using Form CMS 1500. In many instances, medical insurance requires pre-authorization before they will pay for anesthesia. You have sent multiple CMS 1500 forms requesting payment for anesthesia services that need to have pre-authorization.
Given all of that, what do you need help with?
a. Help filling out the CMS 1500 form?
b. Help with the appeal letter to the insurance carrier(s)?
Totally different point: did the dentist pay the CRNA? If he did, then dentist must bill for the anesthesia services in order to get reimbursed. If he did not, then the CRNA should bill using his own NPI Number.