For TSH reflex FT4/ reflex FT3, see parameters listed below:
Free T4: Will reflex if the TSH is < 0.30 µIU/mL or > 5.33 µIU/mL
Free T3: Will reflex if the TSH is < 0.30 µIU/mL or > 5.33 µIU/mL and the Free T4 is < 0.8 ng/dL
Additional charges/CPT codes will apply.