Look carefully on additional development request (ADR) letters to make sure you're sending your ADR response to the right address. When NHIC sends out ADRs, it includes educational inserts and fliers in the hard copy. Providers have accidentally been sending their ADR documentation to the address on the educational fliers instead of the ADR address, NHIC warns on its website. Bottom line: "If you receive an ADR for medical records from any Medicare contractors, please submit the necessary records to the address indicated on the ADR; not on the flier or insert," NHIC says.