Philips said the US Department of Health had cancelled most of an order for 43,000 ventilators, leading the Dutch medical equipment maker to cut its 2020 earnings outlook.
The termination follows a July report by the US Congress House Subcommittee on Economic and Consumer Policy that found the White House had overpaid Philips by at least $500m.
Philips has denied any profiteering on ventilators.
Philips was one of several firms contracted by the US to supply 187,000 ventilators to the strategic national stockpile to treat patients affected by Covid-19.
It expanded capacity in Pennsylvania and California to meet sudden demand but said in a statement today that it will now deliver just 12,300 hospital ventilators by the end of the year to the US Department of Health and Human services.
A spokesman said he expected Philips will find other buyers for the 30,700 excess ventilators.
"We continue to expect to return to growth and improved profitability in the second half of the year, starting in the third quarter," Philips chief executive Frans van Houten said.
Philips had said in July that the surge in orders for medical equipment would enable it to achieve an "adjusted EBITA (earnings before interest, taxes, and amortisation) margin improvement" this year.
But it said today it expects "to deliver modest comparable sales growth with an adjusted EBITA margin of around the level of last year".
Philips' core earnings fell almost a quarter in April-June to €418m as sales dropped 6% to €4.4 billion.
