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Test Code ZINC Zinc, Plasma or Serum

Performing Laboratory

LabCorp of America


Inductively Coupled Plasma-Mass Spectrometry (ICP-MS)

Reference Values

Environmental exposure: 56−134 μg/dL



  Chronic oral zinc supplementation interferes with copper absorption and may precipitate copper deficiency. Albumin is the primary zinc binding protein: zinc levels should be interpreted with awareness of serum albumin level.


Test Classification and CPT Coding


Day(s) and Time(s) Performed

Monday through Saturday


TAT 4 - 5 Days

Specimen Required

Container/Tube: Royal blue-top (EDTA) tube or royal blue-top tube without EDTA
Specimen:  2mL plasma(preferred)or serum ( 0.6 mL min)

Transport Temperature: Refrigerated


Note: Separate serum from cells within 45 minutes of collection and transfer to a plastic transport tube. Plasma may be separated immediately and transferred to a plastic transport tube.

Useful For


Monitor exposure to zinc; evaluate suspected nutritional inadequacy, especially in enteral or parental nutrition, critically ill or burn patients; cases of diabetes or delayed wound healing; growth retardation; follow therapy, for example when higher intravenous zinc doses are used to balance excessive ongoing GI losses in long-term total parenteral nutrition; follow oral zinc therapy in Wilson's disease; confirm acrodermatitis enteropathica and follow therapy


Computer Interface Code

PDM # 5902800