The　impact　of　the　Internet　of　Things　(IoT)　on　the　advancement　of　the　healthcare　industry　is　immense.　The　ushering　of　the　Medicine　4.0　has　resulted　in　an　increased　effort　to　develop　platforms,　both　at　the　hardware　level　as　well　as　the　underlying　software　level.　This　vision　has　led　to　the　development　of　Healthcare　IoT　(H-IoT)　systems.　The　basic　enabling　technologies　include　the　communication　systems　between　the　sensing　nodes　and　the　processors;　and　the　processing　algorithms　for　generating　an　output　from　the　data　collected　by　the　sensors.　However,　at　present,　these　enabling　technologies　are　also　supported　by　several　new　technologies.　The　use　of　Artificial　Intelligence　(AI)　has　transformed　the　H-IoT　systems　at　almost　every　level.　The　fog/edge　paradigm　is　bringing　the　computing　power　close　to　the　deployed　network　and　hence　mitigating　many　challenges　in　the　process.　While　the　big　data　allows　handling　an　enormous　amount　of　data.　Additionally,　the　Software　Defined　Networks　(SDNs)　bring　flexibility　to　the　system　while　the　blockchains　are　finding　the　most　novel　use　cases　in　H-IoT　systems.　The　Internet　of　Nano　Things　(IoNT)　and　Tactile　Internet　(TI)　are　driving　the　innovation　in　the　H-IoT　applications.　This　paper　delves　into　the　ways　these　technologies　are　transforming　the　H-IoT　systems　and　also　identifies　the　future　course　for　improving　the　Quality　of　Service　(QoS)　using　these　new　technologies.　©　1998-2012　IEEE.