LDL Subclasses
Ordering Recommendation
Quantitative Electrophoresis
1-8 days  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
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
 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 NameLOINC
0050023LDL Phenotype35505-7
0050159Cholesterol, Total2093-3
0080531LDL1 (LDL 1 Fraction)43392-0
0080532LDL2 (LDL 2 Fraction)46984-1
0080533LDL3 (LDL 3 Fraction)46985-8
0080534LDL4 (LDL 4 Fraction)43393-8
0080535LDL5 (LDL 5 Fraction)57938-3
0080536LDL6 (LDL 6 Fraction)49026-8
0080537LDL7 (LDL 7 Fraction)49027-6
0081007VLDL, Cholesterol2091-7
0081008Midband C51002-4
0081009Midband B51003-2
0081010Midband A51004-0
0081011Total LDL-Cholesterol2089-1
2004029EER LDL Subclasses11526-1
* 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.
  • LDL fractions
  • LDL phenotype
  • LDL Subfractions
  • LDL Subtype
  • Low Density Lipoprotein Subclass Pattern