An official website of the United States government
The Letter ID is a number that can be found in the upper left corner of the Defense or Demand Letter in the Re. (Regarding) section of the letter. You must enter all numbers when you are entering the Letter ID on this page. Spaces and special characters are not allowed.
A federal government website managed and paid for by the U.S. Centers for Medicare and Medicaid Services.
7500 Security Boulevard, Baltimore, MD 21244