Instructions to the A/B MACs Regarding Provider Education for the Unique Tracking Number (UTN) Field Requirements for Prior Authorization
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January 13, 2015 - Revised: 01.29.15

Instructions to the A/B MACs Regarding Provider Education for the Unique Tracking Number (UTN) Field Requirements for Prior Authorization

The Medicare Treatment Authorization field must contain blanks or valid Medicare data in the first 14 bytes of the treatment authorization field for DDE and hardcopy claims and at the loop 2300 REF02 (REF01=G1) segment for the ASC X12 837 claim. Institutional claims submitted without blanks or valid data will be returned to the provider for correction.

The following is being provided for informational purposes and can be used as needed. Valid data in the loop 2300 REF02 (REF01=G1) segment for the ASC X12 837 claim is:

  • Unique Tracking Number (UTN)=FIRST TWO POSITIONS OF UTN MUST BE ALPHA-NUMERIC AND NOT CONTAIN SPACES, THIRD POSITION OF UTN IS AN A OR H, LAST 11 POSITIONS OF UTN MUST BE NUMERIC AND NOT CONTAIN SPACES.
  • TRIAL 49
  • SPN66
  • 64
  • 56
  • A/B REBILLING
  • 54
  • SPN65
  • 07
  • 08
  • Valid 18-byte OASIS Treatment Number for Home Health claims

Prior to January 5, 2015, the A/B MACs shall remove the invalid UTN data on adjustments when carried over from a claim.


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