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Ordering Info & Methodology

Test Code

Cerner Synonyms


Insulin, Fasting Insulin, Immunoreactive Insulin, Insulin Assay, Insulin Level, Native Insulin

Turn Around Time


Analyzed within 2 days of receipt when received Monday-Friday.

Sandwich immunoassay, electrochemiluminescence, Roche Cobas

Ordering Guide

Specimen Requirements

Sample Type

Collection Container

Alternate Collection Containers




1.0 mL

Seven days

Add on stability
This is the length of time after sample collection that this analyte is stable. Test can be added to a previously collected sample if the time since collection is less than the add on stability time.

Minimum Volume

Add On Stability

Collection and Shipping Requirements

Freeze. Send frozen on dry ice.

Reference Intervals

Female Reference Interval

Age Category
Reference Interval
≥19 y

Male Reference Interval

Age Category
Reference Interval
≥19 y
Additional Notes

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Measurement Uncertainty (MU)
Every laboratory value is an estimate of the true concentration of substance. MU is the 95% confidence interval around that estimate. 95% of the time, the true concentration will be within the range of the reported value ±MU. This value is based on analytical variability (precision) and does not reflect other factors such as sample collection and handling which may also affect the result.


Reported sodium = 140 mmol/L
Sodium MU = 1%
Expanded uncertainty = 140 mmol/L ± 1% or 140mmol/L ± 1.4 mmol/L
Interpretation - the true value of sodium in the sample is in the range 138.6-141.4 mmol/L, with 95% confidence.


Measurement Uncertainty

Reference intervals assume a fasting state. Insulin levels are not interpretable in non-fasting patients with the exception of critical hypoglycemia samples.

Assay interferences are possible in patients taking high dose (>5mg/day) biotin supplementation.

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