Exagen Inc. reported preliminary unaudited revenue results for the quarter ended December 31, 2020. Testing revenue for the three months ended December 31, 2020 is expected to be between approximately $10.5 million and $10.8 million, an increase of 11% and 15% compared with $9.5 million in the third quarter of 2020, and an increase of 10% to 13% compared with $9.6 million in the fourth quarter of 2019.