TEST DIRECTORY | MIDx Labs

LOW-DENSITY LIPOPROTEIN (LDL, MEASURED)

A primary marker used to assess cardiovascular risk and guide lipid-lowering therapy.

LIS TEST CODE: DLDL

CPT CODE: 83721

ALIASES: LDL, Direct LDL

METHODOLOGY: Measured, Liquid Selective Detergent

SPECIMEN:

- Type: Serum

- Container: Gold Top (SST) Vacutainer

- Minimum Volume Required: 1 mL

- Storage/Handling: Allow 30 minutes for blood to clot, then centrifuge specimen at 3500 RPM for 10 minutes. Maintain specimen in the refrigerator or in the freezer until testing can be performed.

NOTE: If freezing is required to preserve stability, transfer serum into a separate plastic screw-cap transport container.

- Stability: Room Temperature (20-25 °C): Not Accepted

Refrigerated (2-8 °C): 5 days

Frozen (-20 °C or colder): 3 months; avoid multiple freeze/thaw cycles.

- Turnaround Time: 24 hours from receipt.

Special Instructions: N/A

REJECTION REASONS: QNS, Gross Hemolysis, Gross Lipemia, Contamination, Stability Violation, Expired Container, Incorrect Container

REFERENCE RANGES:

Males & Females (mg/dL)

1 - 19 years of age: < 110

Desirable: 109 mg/dL or less
Borderline: 110 - 129 mg/dL
Higher risk: 130 mg/dL or greater

>=20 years of age: < 130

Desirable: 129 mg/dL or less (99 mg/dL or less if patient has CHD)
Borderline: 130 - 159 mg/dL
Higher risk: 160 mg/dL or greater