LDL Cholesterol, Calculated
LDL Direct will automatically be performed at an additional charge when triglycerides are greater than 400.
NOTE: Acetaminophen concentrations at toxic levels and high doses of N-Acetylcysteine (NAC) used to treat acetaminophen intoxication can falsely lower the result of this test.
NOTE: This test, when ordered on Medicare patients, is subject to the National Coverage Determination (NCD) policy "Lipids Testing". Please verify that the diagnosis code (ICD-9) you have chosen demonstrates medical necessity for the test as documented in the physician's patient record. The CMS web site or the NorDx Limited Coverage Documentation Guide are available to assist you with this verification. A properly executed Advance Beneficiary Notice (ABN) must be submitted with the specimen if medical necessity is not demonstrated by the ICD-9 code chosen.
|Specimen||Draw blood in either a plain, red-top tube or serum gel tube. (FROZEN, GROSSLY LIPEMIC, OR HEMOLYZED SPECIMEN IS NOT ACCEPTABLE.) Patient must not consume any alcohol for 24 hours before specimen is drawn. Spin down, separate serum from cells within 4 hours of draw, and send 1.0 mL (0.5 mL minimum) of serum refrigerated.|
|Reference Values||"Interpretive Guidelines:
Triglycerides: < 175 mg/dL
|Analytic Time||1 Day|
|Day(s) Test Set Up||Monday through Sunday|
83721 LDL Direct (if appropriate)