Congressional Inquiries

Congressional offices may receive inquiries from constituents regarding their Medicare services. The information below provides elements to request assistance from Noridian.

Determine the Correct Medicare Contractor

There are different contractors assigned to administer different parts of Medicare. Use the Provider Compliance Group Interactive Map, to determine the correct contractor. Click on the appropriate state and the contractors name and phone number displays.

Inquiry Submission to Noridian

Noridian accepts inquiries from Representatives through phone, fax, email or mail submission.

What to Include

  • Privacy Release
  • Medicare Summary Notice (MSN) or Remittance Advice (RA)
  • Any correspondence
  • Medicare ID as it appears on the official Red, White, and Blue Medicare card
  • Congressional district office location and fax number where the response should be sent


A response is sent within 10 working days after the inquiry is received in our office. If a longer time period for a final response is necessary (e.g., waiting for an appeal determination, extensive research necessary, further documentation required), an acknowledgement letter will be sent within the 10-day period.

Additional Questions

Due to CMS regulations, contact information should not be shared. Direct beneficiary inquiries to the Beneficiary Contact Center at 1-800-MEDICARE (1-800-633-4227) and suppliers inquiries to the Supplier Contact Center.



Last Updated Oct 28 , 2022