Reimbursements from new HSA account for 2020

I have had an active HSA account since 2011 through my company.  In 2020, my company is switching to a new HSA management account (ie. Optum to Fidelity).  

 

Can I still reimbursement myself for medical expenses paid in 2019 with funds from the new HSA account in 2020?

 

Thanks