Low-Density Lipoprotein Cholesterol (Direct)

Test ID: 

703018

CPT code:

83721

Synonyms:

Direct LDL
Direct LDLC
LDL Cholesterol, Direct
LDLC, Direct

Clinical Use:

For the direct determination of LDL cholesterol in nonfasting patients or in patients whose fasting triglycerides are >400 mg/dL, where the estimation of LDL by calculation may not be possible or may lead to inaccuracies. LDL cholesterol measurement, in conjunction with other lipid measurements, has been shown to be useful in assessing the risk of coronary heart disease (CHD). The National Cholesterol Education Program (NCEP)1 has stated that LDL cholesterol should be the “key index” in determination of CHD risk. Laboratory estimation of LDL cholesterol is most commonly determined by the use of formulas, such as the Friedewald formula.2 Use of this formula is limited to fasting samples with triglycerides <400 mg/dL. Triglyceride values between 250−400 mg/dL may also be associated with errors in LDL cholesterol estimation by calculation which, in turn, can lead to misclassification of the patient in regard to the NCEP guidelines.

Specimen Type:

Serum (preferred) or plasma

Requested Volume: 

0.5 mL

Minimum Volume: 

0.4 mL

Container Type: 

Red-top tube, gel-barrier tube, lavender-top (EDTA) tube, or green-top (heparin) tube

Patient Preparation: 

Patients are not required to fast prior to blood collection. Nonfasting and fasting samples can be used. Nonfasting results are slightly lower than fasting results.

Collection:

Separate serum or plasma from cells within 45 minutes of collection.

Storage Instructions:

Room temperature

Stability Requirements:

Temperature

Period

Room temperature

14 days

Refrigerated

14 days

Frozen

14 days

Freeze/thaw cycles

Stable x

Rejection Criteria

Use of anticoagulants containing citrate

Return Back to Test Directory

MCI Diagnostic

Providing top patient care with fast results. 

7018 South Utica Avenue

Tulsa, Oklahoma 74136

Hours of Operation

Mon - Sat: 7 AM-11 PM

Sun: 7 AM-3 PM

COVID-19 Drive-Thru Hours

Mon-Fri: 9 AM-6 PM

Sat: 9 AM-3 PM

More Information - Click Here

Government Contract

DUNS # 125722608

Cage Code: 3FPQ3

COVID-19

COVID-19 Fee & Pricing