An agent in West Hills, CA asked…
Q: What do the letters at the end of a person's Medicare number mean?
A: Every beneficiary is given a Medicare number. This number is their Social Security number followed by a code, which is often referred to as a claim number. The letter codes may appear on correspondence receive from Social Security or on a beneficiaries Medicare card.
Here is a table showing the most commonly used beneficiary codes, taken from the federal government's Social Security website. (This does not include every code; only the most common ones.)