It has been replaced by the combination of more sensitive TSH and FT4 tests that provide direct measurements. National Correct Coding Initiative (NCCI ) Edit: Free thyroxine (CPT code 84439) is generally considered to be a better measure of the hypothyroid or hyperthyroid state than total thyroxine (CPT code 84436).
Test Includes: T3 Uptake T4 (Thyroxine Total Free Thyroxine Index (FTI) Also Known As: Free Thyroxine Index; FT4 Index; FTI; T7. Also See: Ordering Guidance: The Thyroid Panel (Total T4, T3 Uptake, and estimation of Free Thyroxine Index) has little clinical utility and is not recommended for routine thyroid screening.
Total T4, T3 uptake, and estimation of free thyroxine (FT4) index have limited clinical utility Replaced by the combination of more sensitive TSH and FT4 tests that provide direct measurements T135 Method: Quantitative Electrochemiluminescent Immunoassay Not recommended for routine thyroid screening Replaced by the combination of more sensitive TSH and FT4 tests that provide direct.
The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map. T-Uptake T3 Uptake, S T3U, Serum.
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Test Name and Number Comments Triiodothyronine, Total (Total T3) 0070474 Method: Quantitative Electrochemiluminescent Immunoassay. Not recommended for routine thyroid screening. Indications for ordering are rare cases of suppressed serum thyroid stimulating hormone (TSH) with normal free thyroxine (FT4) (eg, suspected T3 toxicosis, subclinical T3 hyperthyroidism, rare pituitary conditions) Thyroid Stimulating Hormone 0070145 Method: Quantitative Chemiluminescent.
Not recommended for routine thyroid screening. Quantitative Electrochemiluminescent Immunoassay Sun-Sat Within 24 hours This test is New York DOH approved. Patient Preparation. Collect Serum separator tube. Also acceptable: Plasma separator tube, lavender (EDTA pink (K2EDTA or green (sodium or lithium heparin).
Not the preferred initial thyroid disorder screening test. Order following abnormal thyroid stimulating hormone (TSH) result Order in conjunction with TSH if pituitary (secondary) hypothyroidism is suspected Assess thyroid status in pregnant women or those on estrogen supplementation, phenytoin, or salicylates.
Refer to: 30113 T4, Free 30017 Thyroid Stimulating Hormone, Sensitive Spec Collect: Gold top (SST) or Red top (serum) tube. Also acceptable: Light Green top (PST Green top (heparin or Lavender top (EDTA ) tube.
T3 uptake is of little clinical value alone; it is used to determine the Free Thyroxine Index. 84479 Component Test Code Component Chart Name LOINC 0070135 T-2 Component test codes cannot be used to order tests.
FT4I T4 (total) x THBR Specimen serum refrigerate immediately stable for 7 days at room temp, but storage at 4 C preferred. More General Terms Additional Terms References Clinical Guide to Laboratory Tests, 3rd edition, NW Tietz ed, WB Saunders, Philadelphia, 1995.