I was told today by ins. carrier that I should be using a modifier if I send in a "corrected claim". I asked which modifier and she said she couldn't answer that question. Usually when I have to send in a "reconsideration" I do not have to correct the claim - it's because I'm sending in clinical progress notes requested, or other documentation. But recently had to send in a change on a claim, so can anyone tell me what modifier I would use?