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Test Code N.LDLD LDL CHOLESTEROL, DIRECT

Additional Codes

LDLD

Methodology

Automated Chemistry Analyzer

Specimen Requirements

Serum or Plasma

Container: SST or Green top Lithium heparin

Specimen Collection: 1 mL (minimum 0.5 mL)

  1. Allow specimen to clot completely if a serum tube (SST) was used. Separate serum (SST) or plasma (Lithium Heparin) from cells within 3 hours and transport refrigerated. If red top tube is collected, separate serum from cells within 2 hours and place in separate plastic tube immediately.
  2. Properly label tube with patient's name, DOB, requisition number and type of tube sample drawn i.e. GREEN.

Specimen Transport/Stability

Refrigerated: 3 hours on gel, 7 days poured off

Specimen Rejection

1. Grossly hemolyzed

2. Exceeding stability  requirements

3. Unlabeled specimen

Maximum Laboratory Time

24 - 48 hours

Reference Ranges

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

The method of direct measurement of LDL cholesterol is validated with mg/dL. Direct LDL results with triglycerides of greater than 1290 mg/dL should be interpreted with caution.

Day(s) Test Set Up

Daily

Test Classification and CPT Coding

83721