Medicare does not accept claims marked as corrected or voided. If you have claim rejections for "Medicare only accepts claim frequency code of 1", you will need to re-release the claim and select New, not Corrected or Voided. 

New should be selected even if it is a corrected claim. When a Medicare claim is denied or considered unprocessable, the claim is no longer available for correction. A claim with corrected information must be submitted as a new claim.