For whom the bell curve tolls
As many family physicians, coders, and billers know, if your E/M coding pattern varies significantly from the norm of other physicians in your specialty, a Medicare audit can result. But what does the norm look like? According to national data from the Centers for Medicare & Medicaid Services for 2007 (the most recent data available), it looks like this for family physicians:
As one would expect, the norm is almost a bell-shaped curve. If your coding pattern is to the right of this curve (i.e., you code a significantly greater percentage of your encounters at higher levels than the norm), you may want to review the documentation for a sample of encounters to ensure that (1) the documentation supports the level of service and (2) the level of service seems medically reasonable or appropriate.
If your coding pattern is to the left of the curve (i.e., you code a significantly greater percentage of your encounters at lower levels than the norm), you may still want to review the documentation for a sample of encounters. In this case, the rationale for doing so is to ensure that you are not routinely undercoding and leaving money on the exam table in the process. If you're not sure of your coding pattern, you can download an Excel spreadsheet from the FPM Toolbox that will help you calculate it.
In the end, it is not important that you conform to the norm. Rather, it is important that you know where you stand relative to the norm and be able to explain and defend your position, if called upon to do so.
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