The linked Hospital Grade receptacles do not have an isolated ground. Isolated ground models are available which have a triangle symbol on the face of the outlet for IG identification and also have "IG" as part of the model number.
Some older residential construction and maybe some newer commercial-inspired residential construction may have metallic conduit and boxes. In that case, if there is 3-conductor wiring* (2-conductor + ground wire), isolated ground receptacles may be preferable to avoid ground loops.
* Not a common scenario, but I know homeowners with older metallic conduit, boxes and 2-wire feed that have replaced a circuit's wiring by pulling a new 3-wire feed through the conduit, and used an IG receptacle.