Possible Amended HSA

An hospital I visited in 2016 just sent me a refund of ~40$ for overpaying their services.  I believe I paid those services with my HSA funds.  I received form 1099-SA about 2 months ago and I don't think the amount on that form (1902.59$) considered that ~40$ refund.  Should I expect to receive an amended 1099-SA from my HSA provider (UMB Bank)?  If so, it will likely arrive after filing date.  What should I do then?