• Yang heel vessel pattern (TM)

• Yang link vessel pattern (TM)

• Yang pattern (TM)

• Yaws

• Yellow fever

• Yellow nail syndrome

• Yellow oculocutaneous albinism

• Yin heel vessel pattern (TM)

• Yin link vessel pattern (TM)

• Yin pattern (TM)

• Young onset sporadic Parkinson disease

• Young syndrome

• Young-Simpson syndrome

• Yunis-Varon disease