A Taxpayer Identification Number (TIN) is an identification number used by the Internal Revenue Service (IRS) in the administration of tax laws. It is issued either by the Social Security Administration (SSA) or by the IRS. A Social Security number (SSN) is issued by the SSA whereas all other TINs are issued by the IRS.
The date that specifies the end of a primary payer's responsibility for claims.
For Group Health Plan - the termination date specifies the end of group health plan coverage
For Liability & Worker's Compensation cases - the termination date specifies the end of the liable party's responsibility for claims (typically the date of settlement for the liability or worker's compensation case)
For No-fault cases - the termination date specifies the end of the liable insurer's responsibility for claims (typically due to benefits being exhausted or the closure of the no-fault case when the beneficiary has completed treatment for their accident related injuries
TPA (Third Party Administrator)
An entity hired to act on behalf of and/or represent an organization or person for a specific matter such as the recovery of a Medicare lien. For example, a worker’s compensation carrier may hire an "agent" to assist during the Medicare recovery process and provide a proof of representation document allowing that agent to act on their behalf in regards to that specific case.