837 Claim and Claim Acknowledgments (999 and 277CA) Notes (Part 1) 837 Claim and Claim Acknowledgments are among other EDI transactions supported by Cigna. Cigna is currently using 837 Claim and Claim Acknowledgments transactions in support of 5010 compliance and is committed to helping physicians and hospitals successfully use and implement 837 Claim and Claim Acknowledgments. As a result of using Read More →