Lester del Rey 
Badge of Infamy [EPUB ebook] 

In the future, powerful lobbies control much of society. One of the most powerful is the medical lobby, which—following a pandemic that spread across Earth—now requires that medicinal care can only practiced by authorized lobby members and only in approved lobby facilities.

Daniel Feldman, a former doctor, broke the medical lobby’s rules and had cannot practive medicine anymore. To escape the shame, he travels to Mars, which has become a modern