tci Part B Insider - 2011 Issue 20

Reader Question: Modifier AI: Use 2 Letters, No Numbers

Question: The inside cover of my CPT® manual shows modifier A1 (letter A, number 1) for principal physician. Our office manager told me that I was supposed to bill this as modifier AI (letter A, letter I). Which is correct?Missouri SubscriberAnswer: Modifier AI (letter A, letter I) is appropriate for "Principal physician of record." Printing A1 was an error, as indicated in the AMA's "Corrections in CPT® 2011" document at http://www.ama-assn.org/ama/pub/physician-resources/solutions-managingyour-practice/coding-billing-insurance/cpt/about-cpt/errata.page. The most recent update, as of printing time, was April 12, 2011.You should also take note of the correction to the note...

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