IRF Pre-Claim Review Decisions and Claim Submission Instructions

This section explains how to submit Inpatient Rehabilitation Facility (IRF) claims based on the outcome of a pre-claim review request.

When This Applies:

A pre claim review was requested and provisionally affirmed

What Happens to the Claim:

Claim may be submitted for payment with the assigned UTN

When This Applies:

A pre-claim review was requested and non-affirmed

What Happens to the Claim:

Claim must still be submitted but will be denied; appeal rights apply

When This Applies:

Claim submitted without a pre-claim review after selecting Choice 1

What Happens to the Claim:

Claim is held for prepayment medical review

Provisional Affirmative Decision

Applies when a pre-claim review is requested and a provisional affirmative decision is received.

Claim Submission Requirements

  • Include the Unique Tracking Number (UTN) from the decision letter.
    • Each IRF stay is assigned a unique UTN.
Electronic Claims (ASC X12 837):
  • Enter the UTN in positions 1-18.
  • FISS will move the UTN to positions 19-32 and autofill zeros in the first field.
  • The Medicare Treatment Authorization field must contain blanks or valid Medicare data in the first 14 bytes at Loop 2300 REF02 (REF01 = G1).
Other Claim Submissions:
  • Enter the UTN in the second field (positions 19-32).
  • Do not enter data in the first field.
    • FISS will convert the first field to zeros.
    • The claim will process without the UTN present in the first field but will still edit for the IRF UTN.

Final Claim Submission

  • Submit the final claim with:
    • The pre-claim review UTN
    • The rendering provider's NPI

IRF Change During the Benefit Period

If the IRF changes during the benefit period and the new IRF did not submit a pre-claim review request, the claim will undergo complex medical review. The new IRF must submit all supporting medical documentation.

Non-Affirmed Decision

Applies when a pre-claim review is requested and a non-affirmed decision is received.

Claim Submission Requirements

  • Include the UTN from the non-affirmed decision letter.
Electronic Claims (ASC X12 837):
  • Enter the UTN in positions 1-18.
  • FISS will move the UTN to positions 19-32 and autofill zeros in the first field.
  • The Medicare Treatment Authorization field must contain blanks or valid Medicare data in the first 14 bytes at Loop 2300 REF02 (REF01 = G1).
Other Claim Submissions:
  • Enter the UTN in the second field (positions 19-32).
  • Do not enter data in the first field.
    • FISS will convert the first field to zeros.
    • The claim will process without the UTN present in the first field but will still edit for the IRF UTN.

Final Claim Submission and Payment

  • Submit the final claim with:
    • The pre-claim review UTN
    • The rendering provider's NPI
  • Claims associated with a non-affirmed pre-claim review decision will be denied.
  • Standard appeal rights apply, and the claim may then be submitted to secondary insurance, if applicable.

Pre-Claim Review Not Requested

Applies when a claim is submitted without a pre-claim review after the provider selected Choice 1 (Pre-Claim Review).

  • The claim will be held for prepayment medical review.
  • Additional documentation may be requested through an Additional Documentation Request (ADR).
Last Updated Feb 27 , 2026