If UnitedHealthcare does not meet a resignation quota through buyouts, it will lay off employees, two people familiar with the matter said.

If UnitedHealthcare does not meet a resignation quota through voluntary buyouts, then layoffs will occur, reports say.

UnitedHealth (UNH), the largest private health insurer in the U.S., is offering buyouts to certain employees in its benefits operations unit,

The notices are going out to workers in the commercial health coverage business as well as in other operations.

"What Trump and Elon Musk are testing ... They're testing the power of the President to overturn the will of Congress," said Elaine Kamarck.

In a statement to ABC News, a company spokesperson said the "voluntary option is part of our ongoing efforts to ensure our team is best positioned to meet the evolving needs of the people and customers we are honored to serve.

UnitedHealthcare will resort to laying off staff if a certain number of people do not accept the buyouts, sources told CNBC.