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2012 Texas Medicaid Provider Procedures Manual

Volume 1, General Information : Section 6: Claims Filing : 6.2 TMHP Electronic Claims Submission : 6.2.5 Modifier Requirements for TOS Assignment : Assistant Surgery
Assistant Surgery
For assistant surgical procedures, use one of the following modifiers: 80, 81, 82, and AS. Using these modifiers results in TOS 8 being assigned to the procedure.

Texas Medicaid & Healthcare Partnership
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