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Cholesterol, HDL

Item Value
Approval req'd? No
Available Stat? No
Test code HDL
Test group Cholesterol
Performed by Parnassus & Mt. Zion Chemistry
In House Availability Test available 24 hours per day 7 days per week
Method Direct method w/detergent solubilization and w/ cholesterol esterase and oxidase
Patient Preparation Patient should fast for 9-12 hours prior to collection if ordered as part of lipid panel.
Container type Gold top or Light Green top
Amount to Collect 1 mL blood
Sample type Serum or plasma
Preferred volume 0.5 mL serum or plasma
Min. Volume 0.2 mL serum or plasma
Units mg/dL
Normal range HDL Cholesterol:
Acceptable > 39 mg/dL
Higher risk < 40 mg/dL
Lower risk > 59 mg/dL
Synonyms High density lipoprotien; HDL cholesterol; Coronary risk panel
Stability Room temperature 8 hours, refrigerated 2 days, frozen at -20C 1 week
Turn around times 4 hours
Additional information To convert mg/dL to mmol/L (SI units) multiply by 0.0259.

Recommended values are for > 18 year oldS (recommendations for children will be published at a future date).

NOTE: The HDL result may be falsely elevated when triglyceride levels exceed 400 mg/dL. The current HDL assay (Beckman LX20) may produce falsely suppressed HDL results of < 5 mg/dl in approximately 10% of patients with monoclonal proteins. Estimating the risk of atherosclerotic heart disease from the ratio of total/HDL cholesterol is no longer recommended by many experts, who believe that HDL cholesterol is most useful when employed as part of the assay for LDL Cholesterol rather than by itself. Others believe that the ratio of total/HDL cholesterol may better predict coronary risk (high risk males: > 6.0-7.0; high risk females: > 5.6-6.0). Still others believe that the most useful measurement is perhaps non-HDL Cholesterol ( [Total Cholesterol] - [HDL Cholesterol] ), the cholesterol in all lipoprotein particles containing apolipoprotein B, including VLDL. The measurement of non-HDL Cholesterol does not require fasting and does not rely upon assumptions of the Friedewald formula.
Medical Necessity? Yes. Click here for more information
LOINC code 2085-9
Last Updated 11/12/2013 8:44:02 AM
Entry Number 193
Lab Procedure Link Click here for Procedure
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