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Test Code LDL Direct LDL Direct Cholesterol

Performing Laboratory

Memorial Hospital Laboratory- Automated Procedures  304-388-5953       
Teays Valley Hospital Laboratory 304-757-1770

Specimen Requirements

Plasma- Mint Green, Dark Green Lithium Heparin or Serum- SST gold top, red top

Allow SST or red top to completely clot

Spin and physically separate plasma/serum from contact with cells as soon as possible

4 mL of plasma/serum (minimum 2 mL)

Specimen Rejection

  • Improperly labeled, collected, stored, and transported
  • Quantity not sufficient

Storage and Stability

Room temperature 15-25oC 3 hours
Refrigerated 2-8oC 5 days
Frozen <-70oC 3 months

Reference Values

Reference Range: 75-193 mg/dL 

Optimal <100 mg/dL
Near Optimal-Above Optimal 100-129 mg/dL
Borderline High 130-159 mg/dL
High 160-189 mg/dL
Very High > 190 mg/dL

Methodology

Two-phase homogenous assay

Two-phase homogenous assay Memorial, General, Women and Children's, Teays, Cancer Center, Plateau
End Point Greenbrier 

Days Test Set Up and Turnaround

Monday through Sunday, Continuously 

AM Collection Expected by 9AM same day
Routine Expected within 24 hrs
Stat Expected within 1 hr
Timed Expected results are test dependant

CPT Coding

83721