Railroad Medicare Prefix List
| Prefix | Description |
|---|---|
| A | Railroad retiree - file established when the employee was alive |
| MA | Spouse of the Railroad retiree |
| MH | Spouse of the retiree - employee on Railroad pension when Act passed in 1937 |
| H | Employee on Railroad pension when Act passed in 1937 |
| WA | Widow(er) of the retiree - file established when the employee was alive |
| WH | Widow(er) - employee on Railroad pension when Act passed in 1937 |
| WD | Widow(er) of the retiree - file established after the retiree deceased |
| WCA | Disabled child of the retiree - file established while the retiree was alive |
| WCD | Disabled child of the retiree - file established after the retiree deceased |
| WCH | Survivor of disabled child, of retiree - on Railroad pension when Act passed in 1937 |
| CA | Disabled child of the retiree - file established when the employee was alive |
| PA | Survivor parent - file established while employee was alive |
| PD | Survivor parent - file established after employee deceased |
| PH | Survivor parent - employee on Railroad pension when Act passed in 1937 |