Search our extensive Laboratory Test Directory to find test codes, ordering recommendations, specimen stability information, Test Fact Sheets, and more.
Recommendations when to order or not order the test. May include related or preferred tests.
New York DOH Approval Status
Indicates whether a test has been approved by the New York State Department of Health.
This test is New York state approved.
Specimen Required
Patient PreparationInstructions patient must follow before/during specimen collection.
CollectSpecimen type to collect. May include collection media, tubes, kits, etc.
Serum separator tube or plasma separator tube. Also acceptable: green (lithium heparin).
Specimen PreparationInstructions for specimen prep before/after collection and prior to transport.
Transfer 1 mL serum or plasma to an ARUP standard transport tube. (Min: 0.4 mL)
Storage/Transport TemperaturePreferred temperatures for storage prior to and during shipping to ARUP. See Stability for additional info.
Refrigerated.
Unacceptable ConditionsCommon conditions under which a specimen will be rejected.
Contaminated, severely hemolyzed, icteric, or lipemic specimens.
RemarksAdditional specimen collection, transport, or test submission information.
StabilityAcceptable times/temperatures for specimens. Times include storage and transport time to ARUP.
After separation from cells: Ambient: 5 days; Refrigerated: 1 week; Frozen: 1 month (avoid repeated freeze/thaw cycles)
Methodology
Process(es) used to perform the test.
Quantitative Chemiluminescent Immunoassay (CLIA)
Performed
Days of the week the test is performed.
Sun-Sat
Reported
Expected turnaround time for a result, beginning when ARUP has received the specimen.
Within 24 hours
Reference Interval
Normal range/expected value(s) for a specific disease state. May also include abnormal ranges.
Test Number
Components
Reference Interval
Soluble Transferrin Receptor
age
mg/L
0 - <1 year
0.98 - 1.99
1 - <2.5 years
1.37 - 2.64
2.5 - <14 years
1.03 - 2.09
14 - <18 years
0.79 - 1.68
18 and older
0.90 - 2.01
Interpretive Data
May include disease information, patient result explanation, recommendations, or details of testing.
The Beckman Coulter Access sTfR immunoassay is intended as an aid in the diagnosis of iron deficiency anemia, especially in patients with chronic disease. In adult patients with anemia, an sTfR result greater than or equal to 1.55 mg/L is 86 percent sensitive and 49 percent specific for the presence of iron deficiency anemia, alone or in combination with anemia of chronic disease. The sTfR assay is not intended to be used in isolation; results should be interpreted in conjunction with the patient’s clinical presentation and other diagnostic tests, such as other indicators of iron status (refer to table below).
The American Medical Association Current Procedural Terminology (CPT) codes published in ARUP's Laboratory Test Directory are provided for informational purposes only. The codes reflect our interpretation of CPT coding requirements based upon AMA guidelines published annually. CPT codes are provided only as guidance to assist clients with billing. ARUP strongly recommends that clients confirm CPT codes with their Medicare administrative contractor, as requirements may differ. CPT coding is the sole responsibility of the billing party. ARUP Laboratories assumes no responsibility for billing errors due to reliance on the CPT codes published.
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
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