Dr Gerald Berg performed procedures that were covered by my insurance and did not notify me that the service was covered. After researching my coverage, Dr Berg had overbilled $400 for services covered under my Aetna insurance. I filed a complaint with Aetna who confirmed the service is under my insurance plan and Aetna sent a formal notice to Dr. Berg; however, Dr. Berg is refusing to provide me a refund. I do not recommend Dr. Berg at all.