Test Code T4FREE T4 FREE

Performing Location

Southwestern Vermont Medical Center

Collection Instructions

Refer to venipuncture protocol

Collection Container

Gold top or Marble Red top vacutainer

Specimen Required/Volume

1.0ML

Specimen Type

serum

Turn-Around Guidelines

Upon arrival daily

Reference Values

0.8 - 2.2 ng/dL

Method

VITROS5600-Competitive Immunoassay

CPT

84439

LOINC

3024-7