is normal there is no recent or ongoing severe illness3 THYROID HORMONES TEST REFERENCERANGETSH ... haracterized by a serum TSH above the upper reference limit in combination with a normal free ... Normal Range 0.3 - 4.0 mIU/L Free T 4 Normal Range 0.7-2.1 ng/dL TSH 0.35-4.94 uIU / mL Free T4 0.7-1