Certain prescription drugs require preauthorization from CVS Caremark before a prescription can be filled. Your pharmacist will advise you when preauthorization is needed and will call the doctor. The doctor will call CVS Caremark on your behalf.

If preauthorization is needed for a specific drug or supply amount being filled by the mail order service, CVS Caremark will request preauthorization by fax from the prescribing physician. If preauthorization is needed for a vacation supply, contact CVS Caremark at (800) 552-8159.