What account number should I use to initiate a direct deposit or electronic debit to my health savings account (HSA)?

What do I need to give to a company to initiate an electronic ACH deposit or withdrawal on my RCU account? How can I place a stop payment on an electronic ACH debit? Will my Health Savings Account be charged a fee? Health Savings Account (HSA) rates Who is eligible to participate in Health Savings Accounts? What happens if you don’t use the money in an HSA (Health Savings Account) by the end of the year? What is a Health Savings Account, why would I need an HSA, and how do they work? For Health Savings Accounts, what are qualified medical expenses?