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Test Code SQ LDLD, EPIC LAB102 LDL Cholesterol, Direct Measure, Plasma

Important Note

When patient blood or urine sample is taken while elevated levels of N-acetyl-p-benzoquinone imine (NAPQI, a metabolite of Acetaminophen) and/or N-acetylcysteine (NAC) are still present, possible interference may lead to falsely low recovery of assays that use the Trinder methodology.

There appears to be no risk for results in the normal reference range; however, there could be a medical risk related to results in the range of medical decisions and differentiation of diagnoses for patients that have had Acetaminophen and/or NAC administered if the blood/urine samples have been collected before sufficient time has lapsed.


Homogeneous Enzymatic Colorimetric Assay

Performing Laboratory

Meriter Laboratories

Specimen Requirements

Patient Preparation:

Fasting preferred, but Non-Fasting also acceptable


Specimen Type: Plasma
Container/Tube: Light-green top (lithium heparin gel)
Specimen Volume: 1 mL
Collection Instructions: Avoid hemolysis.

Specimen Transport Temperature


Reference Values

The National Cholesterol Education Program (NCEP) has set the following guidelines (reference values) for LDL:

Optimal: <100 mg/dL
Near optimal: 100-129 mg/dL
Borderline high: 130-159 mg/dL
High: 160-189 mg/dL
Very high: ≥190 mg/dL

Day(s) Test Set Up

Monday through Sunday

Specimen Requirements Additional Information

Specimen Stability:

Plasma is stable refrigerated (2o C-8o C) for 7 days and frozen (≤-60o C) 30 days.

Test Classification and CPT Coding