tci Part B Insider - 2010 Issue 31

Reader Questions: MCPM Answers Modifier GG Questions

Question:What is the proper way to use modifier GG? Do I append it to a diagnostic mammogram code? Do we need a separate order for the diagnostic exam?Answer:You should report both the screening and diagnostic exams. Append modifier GG (Performance and payment of a screening mammogram and diagnostic mammogram on the same patient, same day) to the diagnostic mammogram code. You will not need an order for the diagnostic exam in this case.Example: A patient presents for a screening mammogram. The radiologist detects a suspicious abnormality requiring further imaging and performs a separate unilateral diagnostic mammogram on...

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