Medicare states that diabetic screenings who meet the criteria for pre-diabetes are to be reported with modifier TS appended to the line item. Just so I am clear here, would you append this modifer to every CPT code?

For example, if the patient came in for the screening and the provider performed an E/M service and then performed the screening, would you add the TS modifier to the E/M, finger stick code, and the lab code? Also, since Medicare will pay for diabetic screenings every six months for patients who meet the criteria for pre-diabetes, would you append the TS only to the second screening?