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Reflex TSH
MessageFor Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.
If TSH is abnormal, a reflex order for Free T4 is added at an additional charge
If TSH is abnormal, a reflex order for Free T4 is added at an additional charge
Test Code
RTSH
Alias/See Also
36127;
TSH w/Reflex
TSH w/Reflex
CPT Codes
84443
Includes
Reflex to Free T4 (71124) if TSH is <0.1 or >10.0 at an additional charge (CPT code(s)84439) .
Preferred Specimen
serum
Minimum Volume
1.0 mL
Other Acceptable Specimens
plasma from Lithium Heparin (Light Green Top) tube
Instructions
Barrier tubes (serum separator tubes or plasma separator tubes) are preferred. If non-barrier tubes are utilized, the serum/plasma must be removed immediately after centrifuging and placed in a screw-cap transfer tube.
Collection notes: Avoid hemolysis. Invert tubes at least 8 times. Allow to clot in an upright position for 30 minutes. Within 2 hours, centrifuge tubes 10 minutes. Keep tightly stoppered.
Do NOT re-centrifuge tubes. Do NOT freeze the primary collection tube.
Collection notes: Avoid hemolysis. Invert tubes at least 8 times. Allow to clot in an upright position for 30 minutes. Within 2 hours, centrifuge tubes 10 minutes. Keep tightly stoppered.
Do NOT re-centrifuge tubes. Do NOT freeze the primary collection tube.
Transport Container
Original tube preferred, may be sent in a screw-top transfer tube.
Transport Temperature
Room Temperature or Refrigerated
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis, Lipemia, incorrect specimen type, insufficient sample volume, improper storage conditions, contaminated sample.
Methodology
Immunoassay
Setup Schedule
24/7
AU
AU
Report Available
daily
Performing Laboratory
Compunet Clinical Laboratories, LLC
2308 Sandridge Drive
Moraine, OH 45439
Last Updated: December 7, 2021