Methodology
Immunoassay
Synonyms
T4 (Thyroxine), Free
Specimen Type
Serum or Plasma
Performing Lab
RCHSD Chemistry
Epic ID
LAB127
Lab Test Days
Monday-Friday
Collection Information
Specimen Required
1-2 mL Blood
Container Type
Light Green (Lithium Heparin PST)
Collection Instructions
Plasma collected in an EDTA (lavender-top) or serum collected in a (red-top)/serum separator tube (SST) are also acceptable.
Processing Information - Lab Use Only
Test Volume Required
0.5 mL Plasma or Serum
Minimum Test Volume
0.3 mL Plasma or Serum
Processing Instructions
Centrifuge and separate plasma or serum. Give to Chemistry Monday-Friday. Place in refrigerator on weekends.
CPT Codes
84439
Revised
04-21-16
Initials
SL