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Modifier Flowcharts: -GX and -GY

Modifiers -GX (notice of liability issued, voluntary under payer policy) and -GY (Item or service statutorily excluded, does not meet the definition of any Medicare benefit or, for non-Medicare insurers, is not a contract benefit) tend to cause confusion for many coding professionals. This resource form may be used to clarify when these modifiers are appropriate to append.

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