Meaning of the Letters in the Medicare ID#?

What do the letters mean on the Medicare Claim number?

The Social Security number followed by one of these codes is often referred to as a claim number.
They assign these codes once you apply for benefits.
These letter codes may appear on correspondence you receive from Social Security or on your Medicare card.
They will never appear on a Social Security card.

What does the letter on the Medicare Card mean?

For example, if the wage earner applying for benefits and your number is 123-45-6789, then your claim number is 123-45-6789A.
This number will also be used as your Medicare claim number, once you are eligible for Medicare.

Code      Identification

A  Primary claimant (wage earner)
B Aged wife, age 62 or over
B1 Aged husband, age 62 or over
B2 Young wife, with a child in her care
B3 Aged wife, age 62 or over, second claimant
B5 Young wife, with a child in her care, second claimant
B6 Divorced wife, age 62 or over
BY Young husband, with a child in his care
C1-C9 Child – Includes minor, student or disabled child
D Aged Widow, age 60 or over
D1 Aged widower, age 60 or over
D2 Aged widow (2nd claimant)
D3 Aged widower (2nd claimant)
D6 Surviving Divorced Wife, age 60 or over
E Widowed Mother
E1 Surviving Divorced Mother
E4 Widowed Father
E5 Surviving Divorced Father
F1 Parent (Father)
F2 Parent (Mother)
F3 Stepfather
F4 Stepmother
F5 Adopting Father
F6 Adopting Mother
HA Disabled claimant (wage earner)
HB Aged wife of disabled claimant, age 62 or over
M Uninsured – Premium Health Insurance Benefits (Part A)
M1 Uninsured – Qualified for but refused Health Insurance Benefits (Part A)
T Uninsured – Entitled to HIB (Part A) under deemed or renal provisions; or Fully insured who have elected entitlement only to HIB
TA Medicare Qualified Government Employment (MQGE)
TB MQGE aged spouse
W Disabled Widow
W1 Disabled Widower
W6 Disabled Surviving Divorced Wife

NOTE: This list is not complete, but shows the most common beneficiary codes.

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