What medical specialties are Dr. House’s two board certifications in House M.D.?

Dr. House’s two board certifications in House M.D. are infectious disease and nephrology.

Gregory House is presented as a physician certified in both infectious disease and nephrology. These specialties help explain the range of cases he handles: infectious disease concerns illnesses caused by pathogens, while nephrology focuses on the kidneys and related disorders. House’s diagnostic department works beyond the boundaries of either specialty, but his training gives him a strong foundation for complex systemic illnesses.

Nephrology is also tied to House’s history before the series begins. He suffered a severe infarction in the quadriceps muscle of his right leg, leading to permanent damage, chronic pain, and the characteristic limp for which he uses a cane. The medical consequences of that event become an important part of his identity.

Viewers sometimes choose neurology because House investigates brain symptoms, or oncology because Wilson is an oncologist. Those are important fields in the show, but they are not House’s stated board certifications. The canonical pair is infectious disease and nephrology.