ARUP's Laboratory Test Directory

LDL Subclasses : 0050021

Mnemonic: LDL SUBC

Methodology: Quantitative Electrophoresis
Performed: Fri
Reported: 1-8 days
Specimen Required: Patient Prep: Patient should be fasting for 12 hours prior to collection.

Collect: Plain red, lavender (EDTA), or pink (K2EDTA).

Specimen Preparation: Separate from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.2 mL)

Storage/Transport Temperature: Refrigerated.

Unacceptable Conditions: Heparinized plasma. Specimens from patients receiving heparin.

Stability (collection to initiation of testing): Ambient: 8 hours; Refrigerated: 2 weeks; Frozen: 6 months
Reference Interval:
 
Test Number Components Reference Interval
 Cholesterol Adults: 199 mg/dL or less
Children: 169 mg/dL or less
 LDL1 (LDL 1 Fraction) 57 mg/dL or less
 LDL2 (LDL 2 Fraction) 30 mg/dL or less
 LDL3 (LDL 3 Fraction) 6 mg/dL or less
 LDL4 (LDL 4 Fraction)None Detected
 LDL5 (LDL 5 Fraction) None Detected
 LDL6 (LDL 6 Fraction) None Detected
 LDL7 (LDL 7 Fraction) None Detected
 Midband A 25 mg/dL or less
 Midband B 15 mg/dL or less
 Midband C 23 mg/dL or less
 VLDL-Cholesterol 22 mg/dL or less
 HDL-Cholesterol 40-59 mg/dL
 Total LDL-Cholesterol 130 mg/dL or less
 Mean LDL Particle Diameter By report
 LDL Phenotype By report

Interpretive Data: LDL Type A: Indicative of Type A. Type A is characterized by mainly large buoyant LDL.
LDL  Not Type A: Not indicative of Type A. Not type A is characterized by mainly small dense LDL. Small dense LDL is associated with an increased risk of coronary artery disease.
CPT Code(s): 83701; 82465
Cross References: LDL Subtype (LDL Subclasses), Low Density Lipoprotein Subclass Pattern (LDL Subclasses)