Effective April 1, 2010, Medicare wants all DCs to use the new -GX modifier on all claims for non-covered services. For example, 99203 -GX -GY, 97110 -GX -GP- GY, 98943 -GX -GY, etc. -GX is not to be used for 98940, 98941, or 98942. This new modifier tells Medicare that you have an effective ABN on file and have notified the patient of non-covered services. Note: -GY means the service is “statutorily not covered under Medicare” and -GP means a particular service is a physical therapy procedure.
New Medicare Modifier…GX
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