In House M.D., the diagnostician at the center of the series is Gregory House.
The character is a physician specializing in diagnostic medicine, portrayed by Hugh Laurie throughout the show's eight-season run. His surname supplies the series title, making it one of the show's most recognizable identifying details.
House is written as exceptionally gifted but socially abrasive, and he often approaches unexplained illnesses as logic puzzles. His reliance on a cane and Vicodin is part of the character's established medical and personal history, not merely a visual trademark.
The name can be confused with the show's title, which is styled as House M.D. in promotional usage and often shortened to House. Gregory is his given name, while House is the single-word surname used in the answer.