Iron and Total Iron-binding Capacity (TIBC)

Iron and Total Iron-binding Capacity (TIBC) CPT: 83550

Synonyms

Fe and TIBC

TIBC and Iron

Total Iron-binding Capacity (TIBC)

Transferrin Saturation

Unsaturated Iron-binding Capacity (UIBC)

Test Includes

Percent of saturation; serum iron; total iron binding capacity; unsaturated iron binding capacity

Expected Turnaround Time

Within 1 day

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Specimen Requirements

Specimen

Serum (preferred) or plasma (lithium heparin only). EDTA plasma causes decreased results.

Volume

2 mL

Minimum Volume

0.5 mL

Container

Gel-barrier tube, transport tube, or green-top (heparin) tube; do notuse EDTA or oxalate anticoagulants.

Collection

Separate serum or plasma from cells within 45 minutes of collection.

Storage Instructions

Maintain specimen at room temperature.

Stability Requirements

Temperature	Period
Room Temperature	14 days
Refrigerated	14 days
Frozen	14 days
Freeze/thaw/ cycles	Stable x 3

Patient Information

Why Get Tested?

Along with other iron tests, to assess your body’s ability to transport iron in the blood; to help diagnose iron-deficiency or iron overload.

When To Get Tested?

When you have low hemoglobin and hematocrit on a complete blood count (CBC); when your healthcare practitioner suspects you may have too much iron (overload) or too little iron (deficiency) in the body.

Sample Required?

A blood sample drawn from a vein in your arm.

Test Preparation Needed?

You may be instructed to have your blood drawn in the morning and/or fast for 12 hours before the test; in this case, only water is allowed. Follow any instructions from your healthcare practitioner and/or from the laboratory performing the test.