The process of transitioning clearinghouses is pretty straightforward. It will usually just require a redo of the enrollment paperwork.
While payers will accept incoming claims (usually EDI or 837 files) from multiple sources (multiple clearinghouses, mailed forms, payer portals), the ERA or Electronic Remittance (835 files) will typically only be sent to one destination/system. So all claims processed will appear on the single ERA, which depending on the circumstances and timing, could go into your previous EMR.
If you need assistance with changing your clearinghouse, please reach out to your account manager or support (www.drchrono.com/help) for assistance.
If you are changing clearinghouses as part of your implementation onto the DrChrono EHR, your implementation specialist will assist you with this.