International Medicine and Disease Olympiad


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 2022, the IMDO is scheduled for July 30, 2022. 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 30, 2022 between 9:00-23:59 Pacific Time.


The IMDO is level set at around 1st year medical school knowledge of human disease and medicine. The knowledge being tested will likely be something you would be expected to know after a first year in a US-based medical school. There may be questions that push these boundaries a little (ie. more global in scope), but these will be the minority of questions. The following are some resources that we encourage students interested in the IMDO to explore and study:

  • Foundational Texts (foundational resources tested at every round of the competition, even at the national level):

    • Campbell Biology (11th Edition) by Lisa A. Urry, Michael L. Cain and Steven A. Wasserman

  • Applied Texts (High yield resources tested more heavily in the international level):

    • First Aid for the USMLE Step 1 2022 (32nd Edition) by Tao Le and Vikas Bhushan

    • Fundamentals of Pathology by Husain A Sattar

  • Advanced Texts (Not necessary to answer competition questions even at the international level):

    • Harrison's Internal Medicine

    • Robbins' Pathologic Basis of Disease

    • DeVirgilio's Surgery

  • Honorable Mentions:

    • Lippincott's Illustrated Reviews series (great for visual learners out there)

    • Anki Decks

    • Online Amboss Library

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 out countries, please take the USMDO hosted by our partner organization Creative Odyssey. The USMDO qualifying round will be held on June 26, 2022. More information about the USMDO can be found on

Contact Us

For all inquiries, please direct them to the following email:


A special thanks to our volunteers. Without your contributions we would not be able to continue to run this competition. We would especially like to thank the following people for their tireless efforts:

Dr. Nathan Gruberman (Content Consultant), Dr. Prasad Chattaharti (Content Consultant), Dr. James Lin (Content Consultant), Dr. Xinyu Chen (Content Consultant), Dr. Quincy Lu (Content Creation), Anthony Law (Project Management), Victor Borza (Head Question Setter), Sarah Yu (Media Director), Jason Tran (Competition QA), Marco Starger (Competition QA), Peter Mo (Competition QA), Wesley Chu (Tech Support), Sam Yang (Tech Support)