Again, a TPA is usually not the plan administrator. A third-party administrator is a person or entity that adjudicates disability claims. However, the plan administrator is almost always the employer, not a TPA or an insurance company. The term “plan administrator” is often the source of confusion because it is often thought that when an employer uses a third-party administrator (TPA) to administer its plan and adjudicate claims, the TPA should be named as the plan administrator. The plan administrator is responsible for plan compliance. Matrix works closely with Reliance Standard Life Insurance Company.Ī long term disability plan administrator is typically the LTD plan sponsor or employer unless another party is designated. Matrix Absence Management (“Matrix”) is a third-party administrator that evaluates claims for long term disability (LTD).