International Medicine and Disease Olympiad

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The International Medicine and Disease Olympiad (IMDO) is the World Championship Medical and Disease knowledge/problem solving competition for High School students and is held annually online in July/August. The first IMDO was held in 2015 in San Diego, CA, and subsequently was moved online to lower the cost to compete for students throughout the world. The IMDO Foundation Board ensures that the competition is held each year and that each country selects their team in a fair and transparent process.


The IMDO aims to promote interest in the medical field by recognizing the strongest high school problem solvers interested in medicine. The IMDO aims to test both basic medical knowledge related to human medicine and disease, as well as problem solving abilities related to figuring out the best courses of actions given clues that a medical professional might encounter in their career.

The Competition

The International Medicine and Disease Olympiad is held each year at the end of July or beginning of August. In 2023, the IMDO is scheduled for July 29, 2023. The competition will be held online, and consist of a mix of multiple choice questions and free response questions. The exam will be 3 hours in length, and test both knowledge and problem solving skills related to medicine and disease. The exam can be taken at any time on July 29, 2022 between 9:00-23:59 Pacific Time.

How to Compete

To compete in the IMDO, you must be selected to represent your country. If you country has a population above 250 million people, your country may have 8 individual representatives. If your country has a population of 250 million or less people, your country may have 4 individual representatives. You must also meet the following requirements:

  1. You must be younger than the age of 21 (20 or younger) at the time that the IMDO is held. Exceptions may be granted if you are within 1 month of the exam date, but must be applied for by your country’s partner organization (see below for more about this).
  2. You must be a citizen or permanent resident (or equivalent) in the country that you are representing.
  3. You must not already be enrolled in college by the time you compete in the IMDO.

If you satisfy the above requirements, you may represent your country in the IMDO by being selected through your country’s qualification round.

For students representing China, please reach out to our partner organization HuanYing for selection rounds. HuanYing will be hosting the ChinaMDO qualifying round to select students to represent China.

For students representing all our countries, please take the USMDO hosted by our partner organization Creative Odyssey. The USMDO qualifying round will be held on June 25, 2023. More information about the USMDO can be found on