Update by user Jan 21, 2019 Originally posted December 20, 2018, I can update that as of January 20.... Centene had made ZERO effort to contact me. Additional communications with Ambetter in Arizona have also been ignored. Calls are NEVER EVER returned. File appeals all you want, just don't expect them to EVER respond. I filed 4 appeals on September 15, 2018 and to date, I still haven't received a formal response on any of them. SLEAZY FRAUDS!!!! Original review posted by user Dec 20, 2018 Centene Corporation tries to operate and exist as a hidden, unknown parent company of Ambetter, Health Net, and several other trade names. With some insurance companies, there is never any doubt who is the actual parent company is... i.e. SafeCo is a Liberty Mutual company, or Esurance being part of Allstate. However, Centene makes every effort to avoid being known and for good reason. They are a fraud. A sleazy unethical FRAUD! Do your research and make sure you aren't selecting a company owned and operated by Centene. They screw up invoices, they fail to pay providers, and fail to respond to appeals and complaints. Any attorney wanting a class action case.... let me know.