David A. Grogan | CNBC
Jim Chanos, head of Kynikos Associates, spoke at the Delivering Alpha conference in New York.
Chanos discussed his bets against Mednax and Envision Healthcare.
"These businesses are earning nothing," he said.
Chanos has previously disclosed his bets against the two firms, with his position against Mednax in place since mid-2017 and his Envision short going since the beginning of 2018.
Share prices for both companies headed lower after Chanos presented his remarks.
Chanos has called the firms "rent seekers" in the health-care system and charged again Wednesday that the firms are shuffling money to cover up how poorly the businesses are performing.
"If nothing happens you're going to see cash flow declines unless of course they ... spend hundreds of millions of dollars each year to keep your cash flow afloat," he said. "They're not going bankrupt tomorrow. On the other hand, they need to keep financing themselves just to keep the illusion going."
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