Is documentation required with the claim when submitting CPT modifier 24? If HCPCS modifiers GN and KX are both required, which modifier should be submitted first? 

Find these answers and more in the Modifier Lookup. This handy tool contains all the information you need to document and correctly submit modifiers. Palmetto GBA revises the information in the Modifier Lookup frequently based on your questions and new published guidance.

Access the Modifier Lookup directly from the home page for your state or jurisdiction.

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Provider Contact Center: 877-567-7271

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