I’ve heard appending modifier TS for diabetes screening codes is optional for pre-diabetes. Is this true?
No, it is not optional. You must append modifier TS to the CPT® code when submitting claims for the screening of Medicare beneficiaries diagnosed with pre-diabetes (previous fasting glucose level of 100–125 mg/d or a two-hour post-glucose challenge of 140–199 mg/dL). This modifier communicates to the intermediary, A/B MAC or carrier that the allowed frequency of each six months applies to the claim. Medicare beneficiaries diagnosed with pre-diabetes will be eligible for the maximum frequency allowed by the statute, which is two screening tests per 12-month period.
This question was answered in our Coding Essentials for Laboratories book. For more hot topics relating to laboratory services, please visit our store or call us at 1.800.252.1578, ext. 2.