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Thread: Does Influenza A = H1N1 Dx?

  1. #1

    Default Does Influenza A = H1N1 Dx?

    AAPC: Back to School
    I code for a group of ED docs and a lot of them are giving the diagnosis of Influenza A. Not sure if I should use 487.1 or 488.1.

    Are these test results available immediately in an ED setting or do the tests need to be sent to the state for confirmation?

  2. #2
    Join Date
    Apr 2007
    Evansville Indiana

    Default Type A flu

    The CDC is stating that a positive Type A flu is 99% positive H1N1, however I would not code for H1N1 without a positive H1N1 test which is not immediate, these take several days to come back. The test for rapid type A is immediate. If you have a positive Type A you should code 487.1 even though there is a strong suspicion that it is H1N1. You would only code the 488.1 with a positive confirmation. The 488.1 code states identifednovel H1N1 influenza virus.

  3. #3
    Join Date
    Apr 2007
    Greeley, Colorado


    I agree with Cheermom. A positive influenze A test does not definitively mean H1N1. Use 487.1.
    Lisa Bledsoe, CPC, CPMA

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