1. One or more non-transitory computer storage media storing computer-useable instructions that, when executed by a computing device, cause the computing device to perform operations, the operations comprising: receiving a request for causing generation of an Electronic Data Interchange (EDI) 835 transmission; providing a user interface on a display device of the computing device, wherein the user interface includes a plurality of input fields for selecting one or more data sources of claims data and for inputting test data; extracting from the one or more data sources selected, via a network, a plurality of historical EDI transmissions of claims data that include a plurality of different data formats; formatting the plurality of different data formats of the plurality of historical EDI transmissions of claims data into a predetermined 835 transmission format standard; electronically generating, via one or more processors, a merged EDI 835 transmission from the 835 transmission format standard of the plurality of historical EDI transmissions of claims data, wherein the merged EDI 835 transmission is generated using the claims data and inserting the test data from the user interface to trigger application of a particular rule from an 835 processing system; submitting, via network communication, the merged EDI 835 transmission to the 835 processing system for testing performance of the particular rule with the claims data and the test data prior to live implementation; electronically testing, via the one or more processors, the particular rule of the 835 processing system using the merged EDI 835 transmission as input; and based on the electronically testing, electronically determining, via the one or more processors to modify the performance and increase a processing power of the 835 processing system.