LDL Subclasses
Ordering Recommendation
Submit With Order
Quantitative Electrophoresis
1-8 days
New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation
Patient should be fasting for 12 hours prior to collection.  
Lavender (EDTA), pink (K2EDTA), plain red, or serum separator tube.  
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
Unacceptable Conditions
Heparinized plasma. Specimens from patients receiving heparin.  
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
Component Test Code*Component Chart Name
0050022Mean LDL Particle Diameter
0050023LDL Phenotype
0050159Cholesterol, Total
0080531LDL1 (LDL 1 Fraction)
0080532LDL2 (LDL 2 Fraction)
0080533LDL3 (LDL 3 Fraction)
0080534LDL4 (LDL 4 Fraction)
0080535LDL5 (LDL 5 Fraction)
0080536LDL6 (LDL 6 Fraction)
0080537LDL7 (LDL 7 Fraction)
0081007VLDL, Cholesterol
0081008Midband C
0081009Midband B
0081010Midband A
0081011Total LDL-Cholesterol
2004029EER LDL Subclasses
* 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.
Cross References
  • HDL Subclasses
  • HDL Subfractions
  • LDL fractions
  • LDL phenotype
  • LDL Subfractions
  • LDL Subtype
  • Low Density Lipoprotein Subclass Pattern