I am trying to capture payment for various screenings we do in our family practice, including depression screening, but want to make sure we are billing correctly. We administer a PHQ9 test to our patients at the time of their visit. Would we bill 99420 along w/ an E/M and 25 modifier for the other issues they came in for? Are insurances paying both the E/M and the 99420? What is the difference between 99420 and 96127? When would I use each of these codes? Any help is VERY appreciated!!