Search our extensive Laboratory Test Directory to find test codes, ordering recommendations, specimen stability information, Test Fact Sheets, and more.
Expected turnaround time for a result, beginning when ARUP has received the specimen.
1-6 days
Reference Interval
Normal range/expected value(s) for a specific disease state. May also include abnormal ranges.
Test Number
Components
Reference Interval
Insulin, Fasting
3-25 µIU/mL
Proinsulin, Intact
Age
pmol/L
0-17 year
Not established
18 years and older
Less than or equal to 7.2
Proinsulin, Intact/Insulin Ratio Calc
Age
Ratio (%)
0-17 years
Not established
18 years and older
0.6 - 15.8
Interpretive Data
May include disease information, patient result explanation, recommendations, or details of testing.
Insulin, fasting: This test reacts on a nearly equimolar basis with the analogs insulin aspart, insulin glargine, and insulin lispro. Insulin detemir exhibits approximately 50 percent cross-reactivity. Test reactivity with insulin glulisine is negligible (less than 3 percent). To convert to pmol/L, multiply IU/mL by 6.0.
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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