You can create 270 Eligibility Requests not only using the Eligibility Checker's database but also, if you have the HIPAA Claim Master, you can use the HIPAA Claim Master's tables to create 270 Requests. So if you have claims in 837 format, you can load them to the database with the HIPAA Claim Master. Then, if you want to find out the status of certain claims, you can use the HIPAA Eligibility Checker and query the claim tables to create seamlessly an electronic request that can be sent out to the same payer that is in the claim. Nothing else needed.
Before using form to create such requests you need to setup it. To Open EDI Claims Setup, go to Database > EDI Claims Setup in the main menu window.

"EDI Claims Setup" option under "Database" menu.
To check Eligibility Request Tables, press the "Test" button. If tables are found, the window will look like:

"EDI Claims Setup" window.
After successful testing you can create Requests from Eligibility Request tables. To create an EDI file, Go to Database > Create 270 EDI Files from EDI Claims in the main menu window.

"Create 270 EDI Files from EDI Claims" option under "Database" menu.

270 creator, blank.
The form is almost identical to the form "Create 270 EDI Files" except that query contains different table name and gets results from different tables.
For more information how to work with form "Create 270 EDI Files": Creating Requests from Claim Status Query