Can medical expenses incurred before the HSA was established be paid from the HSA?
A. Individuals who establish an HSA on or before April 15, 2005 can use the HSA to reimburse qualified medical expenses incurred on or after the later of: 1) January 1, 2004; or 2) the first day of the first month that they are covered under an HDHP. For HSAs established after April 15, 2005, medical expenses may not be paid from an HSA if the expenses were incurred before the HSA was established.