As we near the end of the first year of the Notice of Admission (NOA), one MAC is trying to educate its providers on the proper steps to accurately cancel and resubmit an NOA.
NGS notes in the message to providers Nov. 14 that there are few circumstances when the NOA must be canceled and resubmitted to correct the original submission.
When errors are made, there are steps an agency must follow to cancel and resubmit the NOA in order to correct the ‘Admission,’ ‘From,’ or ‘Through (To)’ date, or correct the beneficiary information, they note.
When an HHA realizes the NOA original submission needs to be corrected by submitting a 32D to cancel, and then submitting an accurate 32A, the cancel is done as soon as the error is discovered and the new, corrected NOA is submitted (typically) within two business days.
If the NOA was submitted with incorrect information, all claims submitted following that admission period would be incorrect, so all claims must be canceled prior to submitting the 32D. Once the correct 32A is submitted and processed, the provider may resubmit the claims for the admission period. 
Read the entire notice at