LDL Cholesterol, Direct

Abbrev Code:LDLDIR   
Order Code:LAB102Order Name:LDL Cholesterol Direct
Synonyms:Low Density Lipoprotein; LDLDIR; Lipid
Methodology:Roche: Homogeneous enzymatic colorimetric
Vista: Bichromatic endpoint
CPT Codes: 83721 x1, 83721 x1
Turnaround Time:Performed and reported 24 hours/day.

Collection Instructions

Optimal Volume:2.5 mL
Minimum\Peds Volume:0.6 mL
Container:Green (lithium heparin, gel)
Alternate Containers: Green (lithium heparin, no gel), Red (no gel), Red (gel)
Patient Preparation:
  • Do not eat 10-12 hours before your appointment if you are coming in fasting for labs on lipids, cholesterol, or glucose (sugar). This does not apply to pregnant women.
  • Water, tea or black coffee (with nothing added) is okay.
  • Do not drink other fluids, diet soda or chew gum.
  • If you have concerns about taking your medications, please send a message by clicking on Secure Messaging, Message Your Care Team.

Processing and Shipping

Specimen Processing:Separate serum/plasma from cells within 2 hours of collection. Centrifuge and aliquot 1.25 mL, 0.2 mL minimum. Store in refrigerator asap.
Shipping Instructions:Ship at refrigerated temperature.
Stability:7 days refrigerated; 3 months frozen.
Test Performed at or Referral Lab Chemistry  (Roche-UMMC East)


Reference Range:Lipid Reference Ranges


LDL-Cholesterol: Therapeutic goal
100 mg/dL or less if CHD is present
129 mg/dL or less of no CHD and 2 or more risk factors
159 mg/dL or less if no CHD


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