Court records show that government lawyers subpoenaed the Indiana University School of Medicine on July 30 to provide records of Armstrong's treatments and donations he later made to the school.
The demand came in the government's lawsuit to recover millions of dollars in sponsorship money the US Postal Service paid to Armstrong's teams from 1998-2004. Penalties could approach USD 100 million.
Armstrong's lawyers have asked a Washington, DC, judge to block the subpoena. They called the release of records a violation of privacy and noted Armstrong confessed in 2013 to doping to win the Tour de France seven times. In a deposition given July 23, Armstrong admitted doping prior to 1996, his lawyers wrote.
The demand for medical records came in a late flurry of government subpoenas for documents and depositions as the case nears the end of the evidence-gathering phase. The government also issued subpoenas last week for testimony from Armstrong's former sponsors Nike Inc, Trek Bicycle Corp, Giro Sport Design and Discovery Communications Inc, which took over sponsorship of Armstrong's team in 2005.
Those subpoenas don't name specific company officials, but allow them to choose a "person most knowledgeable" to discuss sponsorship deals and whether the company had any prior awareness of Armstrong's doping.