LDL Cholesterol, Direct
0020257
Ordering Recommendation
 
Mnemonic
LDL D
Methodology
Quantitative Detergent Solubilization/ Enzymatic
Performed
Sun-Sat
Reported
Within 24 hours  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
  
Collect
Plasma separator tube or serum separator tube. Also acceptable: Green (sodium or lithium heparin), lavender (EDTA), or pink (K2EDTA).  
Specimen Preparation
Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)  
Storage/Transport Temperature
Refrigerated.  
Unacceptable Conditions
  
Remarks
  
Stability
After separation from cells: Ambient: 8 hours; Refrigerated: 5 days; Frozen: 1 month  
Reference Interval


                                           
 
Age Desirable Borderline Higher Risk
0-​19 years 109 mg/dL or less 110-​129 mg/dL 130 mg/dL or greater
20 years and older 129 mg/dL or less (99 mg/dL or less if patient has CHD) 130-​159 mg/dL 160 mg/dL or greater
Interpretive Data
CHD Risk Factors:
+1 Age: Men, 45 years and older
Women, 55 years and older or premature menopause without estrogen therapy
+1 Family history of premature CHD
+1 Current smoking
+1 Hypertension
+1 Diabetes mellitus
+1 Low HDL Cholesterol: 39 mg/dL or less
-1 High HDL Cholesterol: 60 mg/dL or greater

LDL Cholesterol: Therapeutic goal
99 mg/dL or less if CHD is present (Optional 69 mg/dL or less).
129 mg/dL or less if no CHD and two or more risk factors.
159 mg/dL or less if no CHD.
(Circulation 2004; 110:227-39)  
Note
 
CPT Code(s)
83721
Components
Component Test Code*Component Chart Name
0020257LDL Cholesterol, Direct
* 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.
Aliases
  • Direct LDL
  • LDL
  • Low Density Lipoprotein