Question: Connecticut Subscriber Answer: One Medicare payer just clarified its stance on this very issue. Practices submitting paper claims or appeals aren't doing themselves any favors by using liquid correction fluid to fix mistakes, according to a June 3 notification from National Government Services (NGS). "Do not modify the [CMS-1500] form," NGS says. "Do not use a stamp, stickers, or write messages across the face of the claim form (e.g., RESUBMITTAL, EOB attached, etc.). Enclose a separate note. Do not use whiteout for corrections or make any marking that crosses multiple items." To read the NGS guidance, visit www.ngsmedicare.com/NGSMedicare/PartB/EducationandSupport/ToolsandMaterials/instructions0805.aspx. -- The answers to the