In the context of medical and/or dental insurance, ADR refers to Additional Documentation Request. This is a request from an insurance payer (like Medicare) for additional records to support a claim. It's not a sign of wrongdoing, but rather a way to ensure compliance with policies and verify the validity of claims. 

Ignoring these requests, or failure to meet their deadlines, can result in a loss of revenue and trigger additional payers' audits and ADR’s.

Terry outlines the ADRs and best practices to make sure your staff is on top of these requests, which helps save your revenue.