ARUP's Laboratory Test Directory

LDL Cholesterol, Direct : 0020257

Mnemonic: LDL D

Methodology: Detergent Solubilization, Enzymatic
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect:  One 4 mL plasma separator tube or serum separator tube.  Also acceptable: green (sodium or lithium heparin), lavender (EDTA), or pink (K2EDTA).

Transport:  1 mL plasma or serum at 2-8°C. (Min: 0.3 mL) Submit specimen in an ARUP Standard Transport Tube.

Pediatric Collection/Transport:  0.2 mL plasma or serum at 2-8°C.

Remarks:  Allow serum to clot completely at room temperature before centrifuging.  Separate serum or plasma from cells ASAP.

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: INTERPRETATION: LDL Cholesterol, Direct                                     
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.                                       
129 mg/dL or less if no CHD and two or more risk factors.                 
159 mg/dL or less if no CHD.
CPT Code(s): 83721
 
 

 

 

 
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