Methodology
Immunoassay (IA)
Specimen Type
Serum
Performing Lab
Quest Diagnostics San Juan Capistrano
Epic ID
Other Reference Test
Lab Test Days
Tuesday-Saturday
Standard TAT
2-3 Days
Collection Information
Specimen Required
3-4 mL Blood
Container Type
Red Top (No Additive)
Collection Instructions
Specimen collection after fluorescein dye angiography should be delayed for at least 3 days. For patients on hemodialysis, specimen collection should be delayed for 2 weeks. According to the assay manufacturer Siemens: "Samples containing fluorescein can produce falsely depressed values when tested with the Advia Centaur TSH3 Ultra assay." Serum collected in a serum separator tube (SST) is acceptable.
Processing Information - Lab Use Only
Transport Temperature
Refrigerate-OK/Frozen-OK/Ambient-OK
Specimen Stability
Room Temp=7 Days; Refrigerated=7 Days; Frozen=28 Days
Test Volume Required
2 mL Serum
Minimum Test Volume
1.5 mL Serum
Included Tests
Ultrasensitive TSH with and without HAMA treatment.
CPT Codes
84443 (x2)
Revised
02-24-20
Initials
SL