2. Thomas Frist, Jr.
Net worth: 7.6 Billion
Dr. Thomas Frist Jr. ranks second in our list of richest doctors in the world. He is a medical doctor from Washington University. However, his massive fortune was made through Hospital Corp. of America that owns and operates about 165 hospitals and 115 freestanding surgery centers spread across 20 states in the country and also in London, UK. He also has business concerns in China. He may be a medical doctor, but he is well known for his successes as a businessman.
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