Complete our complaint form (PDF) or draft your own complaint and submit via email, fax, or mail. You may also file a complaint over the phone. Phone.To file an urgent complaint, call the HMO Help Center. Member resources if you need to file a grievance or complaint about an experience you had with Blue Shield of California or an affiliated service provider. You can file a quality of care complaint if you have a concern about or are not satisfied with the quality of your care or treatment. If you have traditional insurance, you will need to take your complaint to the California Department of Insurance and fill out a Request for Assistance form. You have the right to file a formal complaint with your health plan. Gov or faxing them to 916-255-5241. It is available online to print out, fill out and mail in, or you can call the Board and have them mail you a copy: 800-633-2322. Gov has complaint forms, IMR application forms and instructions online.