Cardio IQ® Homocysteine

Test Code

91733

CPT Codes
83090

Preferred Specimen

1 mL serum

Minimum Volume

0.5 mL

Instructions

Red-top tubes (no gel): Place the specimen in a refrigerator or ice bath for 30 minutes after collection. Centrifuge the specimen as soon as possible after complete clot formation has taken place. Transfer the serum to a plastic screw-cap vial.

Barrier gel separator tubes: Place the specimen in a refrigerator for 30 minutes after collection. Centrifuge the specimen as soon as possible after complete clot formation has taken place. Do not place barrier tubes in an ice bath as freezing may prevent the barrier gel from adequately separating serum from cells.

Transport Container

Plastic screw-cap vial

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 4 days
Refrigerated: 14 days
Frozen: 6 months

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Unseparated serum or plasma • Whole blood specimens • Grossly lipemic

Methodology
Immunoassay (IA)

Setup Schedule

Set up: Mon-Fri nights; Report available: Next day

Reference Range

Male	<11.4 umol/L
Female	<10.4 umol/L

Clinical Significance

An elevated concentration of Homocysteine is an independent risk factor for cardiovascular disease.

Performing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.