What is modifier GG, and when do we report it? Can we report it in either a professional or a hospital setting?
Modifier GG has been approved for both professional and hospital outpatient billing. This HCPCS Level II modifier can be used to describe a screening mammogram that is performed in conjunction with a diagnostic mammogram on the same patient on the same date.
Modifier GG Defined:
Consider the following description to gain a clearer understanding of this modifier to use as needed. GG: A screening mammogram is performed. Review of the images while the patient is still at the facility indicates a suspicious lesion that warrants additional imaging. A diagnostic mammogram is then performed (same day). Modifier GG is assigned to the appropriate diagnostic mammogram CPT code (77065, 77066).
This question was answered in our Breast & Bone Density Procedure Coding Guide. For more hot topics relating to radiology services, please visit our store or call us at 1.800.252.1578, ext. 2.
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