Medicare (ALL) - External Cause of Injury Code

Rejection: ~Acknowledgement/Rejected for Invalid Information | External Cause of Injury Code (E-code). | Principal diagnosis code. ‍

What happened: The first diagnosis code in box 21 is an E-code.

‍Resolution: 'E' codes cannot be the first code in box 21. Need to switch the 'E' code with another diagnosis code in box 21 (see attached picture below).