Health Care Credit Union is a closed charter credit union open to all health care workers living or working in Winnebago County, Wisconsin. Family members of those eligible for membership are also eligible to join and once you become a member of Health Care Credit Union, you can continue your membership even if you leave the health care field. The only other qualification of membership is to maintain a regular share (savings) account with a minimum balance of $25.00. (Minors only need a $5.00 balance).