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Test Directory

Soluble Transferrin Receptor

Test Summary

Soluble Transferrin Receptor (sTFR) values can be within normal limits over a broad range of body iron stores and is elevated only when there is functional (i.e. cellular) iron deficiency. It is usually not affected by chronic disease states, sTFR levels are about 6% higher in people in high altitudes (above 5200 ft/1600 m) and in African-Americans. Reference value may not apply to pregnant females and recent or frequent blood donors.

Aliases

  • N/A

Specimen Collection

Special Instructions

N/A

Preferred Specimen

1 mL serum

Minimum Volume

0.5 mL

Instructions

N/A

Patient Preparation

N/A

Storage

Transport tube

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

  • Room temperature: Not established
  • Refrigerated: 7 days
  • Frozen: 60 days

Limitations

N/A

Other Acceptable Specimens

Plasma collected in: Sodium heparin (green-top) tube, lithium heparin (green-top) tube, or EDTA (lavender-top) tube

Unacceptable Specimens

Icteric samples

Order Code

STRANS

EPIC (Premier) Code

LAB1008

Includes

N/A

CPT Code

  • 84238

Billing Code

  • 670485

CPT Statement

Methodology

Nephelometry

FDA Status

FDA Approved

Physician Attestation of Informed Consent

N/A

Testing Laboratory

Quest Diagnostics Nichols Institute
33608 Ortega Highway
San Juan Capistrano CA, 92675

Department

Reference Testing

Reference Range

0.76-1.76 mg/L

Setup Schedule / Expected Turnaround Time

Tuesday - Saturday; Report available: 2 - 4 days

Specimen Collection

Special Instructions

N/A

Preferred Specimen

1 mL serum

Minimum Volume

0.5 mL

Instructions

N/A

Patient Preparation

N/A

Storage

Transport tube

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

  • Room temperature: Not established
  • Refrigerated: 7 days
  • Frozen: 60 days

Limitations

N/A

Other Acceptable Specimens

Plasma collected in: Sodium heparin (green-top) tube, lithium heparin (green-top) tube, or EDTA (lavender-top) tube

Unacceptable Specimens

Icteric samples

Billing

CPT Code

  • 84238

Billing Code

  • 670485

CPT Statement

Result Information

Methodology

Nephelometry

Testing Laboratory

N/A

Reference Range

0.76-1.76 mg/L

Setup Schedule / Expected Turnaround Time

Tuesday - Saturday; Report available: 2 - 4 days