Free T3
A triiodothyronine (T3) test measures the level of T3 in a sample of your blood. It's used to help diagnose thyroid disease.
Source: MedlinePlus, U.S. National Library of Medicine
Normal range
No published reference range from a named lab yet.
What an abnormal result can be associated with
- A high result
- Increased circulating T4 concentration
- A low result
- Decreased circulating T4 concentration
Associations from LOINC2HPO (Human Phenotype Ontology). This is reference information, not a diagnosis — only a clinician can interpret your result in context.
Details
- Sample
- Serum or plasma · LOINC
- Monitored for
- Hypothyroidism
- Listed under
- Hyperthyroidism · Thyroid Diseases
- Code
- LOINC 3051-0 · pg/mL
- Also known as
- Triiodothyronine (T3) Free, Total T3, Free T3, FR, T3