999 Rejections:  Read an informative article created by Clinic Pro software about reading a 999 rejection file and how to correct the errors. 999 Article Loops and Segments:  An important part of electronic claim processing is understanding rejections that are based on loops and segments of the ANSI 837 file. We are prepared a PDF of the common loops and segments and rejections that you might find in 999 or 277 files. Loops and Segments Common Claim Scrubber Errors - This is a list of Claim Scrubber errors - errors that should be corrected before sending to a clearinghouse. Loops and Segments - Common Errors - This is a list of common loop and segment errors.