Short coat = medical student, long coat = attending. The hospital hierarchy encoded in fabric.
In a hospital, the length of a white coat indicates a person’s level of training. A short, waist-length coat identifies a medical student who is still completing their degree. Longer, knee-length coats are worn by doctors who have finished their medical school and residency training.
A doctor wearing a long white coat is typically an attending physician. This is the lead doctor responsible for your overall care and medical decisions. They have passed all board examinations and completed their specialized medical training. You can trust that the attending has the final say on your treatment plan.
Doctors in the middle of their training are called residents or interns. They also wear long white coats, which can make it difficult to distinguish them from an attending at a glance. Residents work under the supervision of the attending, but they carry significant responsibility for your day-to-day care. If you are unsure of someone's role, simply ask them to clarify their level of training.
Many healthcare professionals now choose not to wear white coats at all to reduce the spread of bacteria. Some doctors find that the coat creates an unnecessary barrier between them and their patients during a conversation. You may see highly qualified specialists wearing scrubs or professional business attire instead of a coat. The quality of care you receive does not depend on the clothing a provider wears.