In House M.D., which character is known for the recurring phrase “It’s never lupus”?

Dr. Gregory House is the character associated with the recurring phrase “It’s never lupus” in House M.D. The line reflects House’s habit of rejecting lupus as a diagnosis even when it appears plausible during a difficult case.

Lupus is a real autoimmune disease that can affect many organs and produce symptoms shared by other illnesses. That variety makes it a believable possibility in a fictional diagnostic puzzle. The show uses the phrase as a running joke because the team repeatedly considers lupus, but the diagnosis rarely turns out to be correct.

The phrase became one of House M.D.’s best-known quotations and is often used in discussions of the show’s medical humor. It should not be interpreted as medical advice: real patients with compatible symptoms may have lupus, and diagnosis requires professional evaluation, testing, and clinical judgment.