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Test Code
STFR
Test Name
Transferrin Receptor, Soluble
CPT Codes
84238
Expected Turnaround Time
2 - 3 days
Clinical Utility

Measurement of sTfR is used to diagnose iron deficiency in individuals with chronic disease (inflammatory diseases, infections, malignancies), many of whom are anemic.
Specimen and Container Info

Specimen Type: Serum

Alternate Specimen Type: Plasma

Collection Container: Red Top, Plain

Alternate Collection Container: Lavender Top (EDTA), Dark Green Top (Lithium Heparin), or Green Top (Sodium Heparin) 

Desired Specimen Volume: 0.5 mL
Collection Instructions
  1. Collect specimen in red top, plain tube via venipuncture.
Processing and Submission Instructions
  1. Separate serum from cells.
  2. Transfer 0.5 mL of serum to a clear aliquot tube (screw cap).
Transport Instructions

Transport to the laboratory refrigerated. 
Stability Requirements

Room Temperature

14 days

Refrigerated

14 days

Frozen

14 days

Freeze/Thaw Cycles

 Stable x3
Causes for Rejection
  • Gross hemolysis
  • Use of yellow-top (ACD) tube
Methodology
Immunochemiluminometric Assay (Icma)
Reference Intervals

See patient report.
Alternate Names
  •  sTfR
  • Transferrin Receptor
Reference Lab
Labcorp Of America Holdings
Testing Schedule
Monday-Friday
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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