Methodology
Enzyme Immunoassay (EIA)
Synonyms
TTG IgG; Celiac
Specimen Type
Serum or Plasma
Performing Lab
RCHSD Serology
Epic ID
LAB0838
Lab Test Days
Tuesday and Thursday
Standard TAT
1 Week
Collection Information
Specimen Required
1-2 mL Blood
Container Type
Gold Serum Separator Tube (SST)
Collection Instructions
Plasma collected in an EDTA (lavender-top) tube is also acceptable.
Processing Information - Lab Use Only
Transport Temperature
Refrigerated-OK/Frozen-OK
Specimen Stability
Room Temp: 8 Hours; Refrigerated: 2 Weeks; Frozen: >2 Weeks (avoid repeated freeze/thaw cycles)
Rejection Criteria
Lipemic; Hemolysis; Microbially contaminated samples; Plasma from heparin tube
Test Volume Required
1 mL Serum or Plasma
Minimum Test Volume
0.5 mL Serum or Plasma
Processing Instructions
Separate serum or plasma and place in the -80 Freezer Celiac rack. Avoid repeated freeze/thaw cycles.
CPT Codes
83516
Revised
1/22/26
Initials
SA