CGM and fingerstick testing should not be used interchangeably, but rather as complementary tools to monitor glucose levels. CGM can provide continuous and real-time data, trends, and alerts, while fingerstick testing can provide more accurate and reliable readings. You should always confirm your CGM reading with a fingerstick test before making any changes to your diabetes treatment plan. You should also consult with your healthcare provider before starting or changing your diabetes care plan based on CGM or fingerstick data.