DOL Field Assistance Bulletin 2006-02 supports the conclusion that an HSA is not a group health plan for DOL purposes, absent unusual circumstances. However, the definition of group health plan under Section 9831(d) leads to the definition in section 5000(b) - a "plan," without elaboration. Section 223 describes an HSA as an "account." I have seen some secondary sources supporting use of HSA's with a QSEHRA and others concluding that an HSA is not a "plan" for IRS purposes. However, I would feel more comfortable if saw an IRS statement that an HSA is not a group health plan.