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Test Code STFR1 sTfR (Soluble Transferrin Receptor), Serum

Additional Codes

Epic Ordering Code LAB5103
NBS code LBC00885
Service code 31277

Reporting Name

Soluble Transferrin Receptor (sTfR)

Specimen Type

Serum


Ordering Guidance


This test should not be used for routine iron status evaluation for patients without confounding pathologies (such as inflammation, infection, chronic disease, or malignancy). For such cases order FERR1 / Ferritin, Serum.



Specimen Required


Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL Serum

Collection Instructions:

1. Within 2 hours of collection, centrifuge the specimen.

2. For red-top tubes, aliquot serum into a plastic vial prior to sending.


National University Hospital-Singapore Note:

NUH Outreach Laboratories:
Specimen Requirements
Submit only one of the following:
Preferred: Yellow Top
Acceptable: Red Top
Processing Requirements
Centrifuge and aliquot serum into a Mayo plastic tube.
Specimen type: Serum
Volume: 1 mL
Storage/transport requirements: Frozen

Specimen Minimum Volume

Serum: 0.6 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 7 days
  Frozen  90 days
  Ambient  7 days

Reject Due To

Gross hemolysis Reject

Method Name

Chemiluminescent Immunoassay

Day(s) Performed

Monday through Friday

Report Available

1 to 3 days
National University Hospital-Singapore Note:

Please note that this is a referral test requiring transport to the external testing facility, and an additional 3-5 days is required.

Reference Values

0.63-2.64 mg/L

 

It is reported that African Americans may have slightly higher values.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Useful For

Aiding in the diagnosis of iron deficiency anemia in patients with chronic disease

CPT Code Information

84238

LOINC Code Information

Test ID Test Order Name Order LOINC Value
STFR1 Soluble Transferrin Receptor (sTfR) 30248-9

 

Result ID Test Result Name Result LOINC Value
STFR1 Soluble Transferrin Receptor (sTfR) 30248-9

Secondary ID

623578

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.
National University Hospital-Singapore Additional Information:

Last updated 06/08/2026