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Important Medicare Numbers

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As the Quality Innovation Network-Quality Improvement Organization we have a number of resources to help you get involved in improving both the quality of your health and the quality of the overall healthcare system in your area. If you are interested in other Medicare related inquires, such as how to file a complaint or where to call for general information, please refer to the table of contact numbers below.

Topic Area

Arizona

California

Appeals and complaints

877.588.1123

877.588.1123

General information

1-800-Medicare

1-800-Medicare

Fraud

800.447.8477

800.447.8477

Insurance counseling

800.432.4040

800.434.0222

Part A and B: Bills and services

800.633.4227

800.633.4227

If you have questions or concerns about whether:

  • You are ready for discharge from a hospital or other healthcare setting.
  • A healthcare service should be ended.
  • You received quality healthcare.

Please visit our beneficiary and family centered care page for more information.

If you are looking for a number that is not listed in this table, please visit the Arizona or California sections of the Medicare website for an exhaustive list.