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The Defense Department said the companies tapped to produce the much-needed equipment are Combat Medical Systems, Hamilton Medical, VyAire Medical and Zoll Medical Corp.
"This will be a time-phased delivery over the next several months and we expect orders to begin shipment within the next few days, with 1,400 being delivered by early May," Pentagon spokesman Lt. Col. Mike Andrews said. "Delivery locations will be determined by FEMA."
The Defense Logistics Agency modified existing contracts with the four companies to purchase the ventilators, Andrews said.
On Friday, President Trump used the Defense Production Act to compel General Motors to produce ventilators after talks between the auto giant and the government stalled. Many hospitals across the country face shortages of critical medical equipment, including ventilators as the number of COVID-19 patients increases daily.
The DLA said it has also provided $2 million in pharmaceuticals and medical supplies, 975,000 gallons of fuel and food and repair parts to two Navy hospital ships -- the USNS Comfort and USNS Mercy.
Nationwide, 153,246 have contracted the illness, including nearly 3,000 deaths.