Webalready a unitedhealthcare dual plan member? Manage your plan benefits and rewards in the ucard hub. Ucard brings your benefits* together. Webyou can use the uhc card online at walmart. I use mines there. Go to account, wallet, benefit cards. Enter the 17 digit card number and your 4 digit security code number then. Webfor all who use united healthcare’s u card, if you’re buying groceries, avoid publix. I love publix but trying to use the u card there, either staffed checkout or self checkout, is a. Serves as the member id for medical, pharmacy, dental, and vision care. Members can use their.