As of January 1, 2012, Medicare only accepts claim frequency code of '1.'
Claim frequency code is also known as Resubmission Code, which is box 22 on the HCFA 1500 form. This field is located on the insurance invoice, within the Additional Claim Info tab, (22) Resubmission Code. For Medicare, the only valid value is '1.' When the Resubmission code is 1, the Orig Ref # field must be blank. See Example