| Item # | Length | Source of Standard | Year Implemented | Version Implemented | Year Retired | Version Retired |
|---|---|---|---|---|---|---|
| 2,320 | 9 | SEER |
Records patient’s social security number. The number is entered without dashes and without any letter suffix. This is not always identical to the Medicare claim number.
Codes (in addition to social security number)
| 999999999 | Unknown |