Specimen Requirements
Title
PHOSPHORUS, URINE-RANDOM
Specimen Requirement
10 mL random urine transported in plastic screw-cap container.
Methodology
Stability
Refrigerated 7 days
Reference Range
By Report*
Turnaround
Clinical Use
Test Code
UPHOS
Thyroid Testing Update: Effective 02/01/2026, T3 Uptake will be discontinued and replaced with Free T4 testing. Free T4 more directly reflects active thyroxine levels and supports clearer clinical interpretation than older, indirect binding assessments. (Click here for more information)