What is the surname of House M.D.’s surgeon Robert?

The surname of House M.D.’s surgeon Robert is Chase.

Robert Chase is an Australian physician and surgeon who joins House’s original diagnostic team at Princeton-Plainsboro. Jesse Spencer played the character, whose surgical training gives the team operative knowledge alongside its internal-medicine and neurological expertise. Chase’s professional relationship with House changes as he becomes more experienced and independent.

Chase is one of the team members who remains connected to the series for much of its run, although the composition of House’s department changes repeatedly. His background and career are explored through cases, family history, workplace conflicts, and later leadership responsibilities.

The surname can be confused with Foreman, another original team member, or with later doctors such as Chris Taub and Remy Hadley. Those characters have different first names and roles. Robert Chase is specifically the Australian surgeon played by Jesse Spencer.