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IRON and TIBC
Test CodeLAB3228
CPT Codes
83550
Preferred Specimen
Green Lithium Heparin tube (Gel separator preferred)
Minimum Volume
0.5 mL plasma
Instructions
CLINIC COLLECTIONS: Collect 0.5 ml plasma in Green Lithium Heparin tube (Gel separator preferred). Must be spun within 2 hours after collection. If no gel separator, plasma must be pulled off cells within 2 hours. If collecting with AST, ALT, VD25, K+, or LDH, label routes to Gold/SST. Collect 1.0 mL of serum in Gold/SST. Must be spun within 2 hours after collection.
Transport Temperature
Refrigerated
Specimen Stability
Room temperature (20 to 25°C): 3 days
Refrigerated (2 to 8°C): 3 days
Freezer (-20°C): 6 months
Refrigerated (2 to 8°C): 3 days
Freezer (-20°C): 6 months
Reference Range
250-450 ug/dL
Last Updated: September 2, 2026
