Summary Plan Description (SPD)

The Summary Plan Description (SPD) is the ERISA-required document that spells out the full terms of an employer-sponsored health plan in accessible language — what's covered, what's excluded, how claims are filed, who the plan administrator is, how appeals work, and what rights members have under ERISA. It's the authoritative document members should reference when there's a question about what the plan does or doesn't cover.

The SPD is distinct from the Summary of Benefits and Coverage (SBC), which is a much shorter, standardized comparison document. The SPD is the full plan explanation, sometimes running 80 to 200 pages depending on the plan's complexity. Federal law requires the plan administrator to provide the SPD within 90 days of a member's enrollment, and within 30 days of a written request thereafter. Any material modification to the plan requires a Summary of Material Modifications (SMM) to be distributed within 210 days after the end of the plan year in which the change took effect (60 days for material reductions in covered services). The SPD governs the plan's terms in disputes and appeals — if the SPD says a service is covered and the TPA denies it, the SPD wins. This is why plan-design language matters so much: ambiguity in the SPD becomes plan-sponsor risk.

The takeaway: if you're an employee and you have a coverage question your plan isn't answering well, request the SPD from HR in writing. It's the document that governs what the plan actually has to cover, and you have a legal right to it.