If you-ve received a few inexplicable denials from your payer, the problem might be due to your carrier's computer software and not your coding prowess. On Dec. 10, National Government Services, a Part B payer in New York, issued an alert noting that "some Part B providers in New York are receiving errors on the Part B Validation Report for invalid diagnosis codes. National Government Services has identified the cause of this problem and has made the changes necessary to correct the issue." If you received these errors, you should resubmit the erroneously denied claims, the carrier advises.