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Alphabetical Index
Low-density Lipoprotein, Direct (8000101387)
Test Mnemonic:

dLDL
Specimen Requirements:
Collection:

Routine venipuncture. Preferred: SST (gel barrier), PST (Plasma separator tube), red-topped tube (see storage instructions) RST (rapid separator tube) (Min.: 3 mL of blood)
Minimum Volume:

3 mL of blood
Storage/Transport:

Delivered to Sample Management within 2 hours of collection
Stability:

Room Temperature for ≤ 24 hours, Refrigerated for 3 days, Frozen for ≤ 3 weeks.  (Avoid repeated freeze/thaw cycles).
Causes for Rejection:

Incomplete and/or incorrect sample identification, improper tube type and/or storage, transport. Gross hemolysis.
Specimen Preparation:

Allow specimen to clot completely at room temperature. Centrifuge to separate serum from cells within 2 hours of collection.
Methodology:

Spectrophotometry
Performed:
Lab:

Clinical Chemistry
Turnaround Time:

STAT: 1 hour      Routine: 8 hours
Reference Range:

By report (reports may vary based on instrumentation, patient age and sex).
CPT 4 Code:

83721
Patient Preparation :

No special patient preparation is necessary.
Effective Date: 12/07/2020
Reviewed By/Date: -
Approved By/Date: Okorodudu, Anthony - 01/27/2021
When ordering tests for which Medicare or Medicaid reimbursement will be sought, physicians should only order tests that are medically necessary for the diagnosis or treatment of the patient. Components of the organ or disease panels may be ordered individually. The diagnostic information must substantiate all tests ordered and must be in the form of an ICD-10 code or its verbal equivalent.

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