Cardio IQ® Homocysteine

Test Code

91733Q

Quest 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 transport tube.

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. Transfer serum to a transport tube.

Transport Container

Transport tube

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

Methodology
Enzymatic

Setup Schedule

Mon-Fri

Reference Range

Age	Male (umol/L)	Female (umol/L)
0-1 years	Not Established	Not Established
2-9 years	≤7.6	≤7.6
10-14 years	≤9.7	≤8.4
15-17 years	≤11.3	≤10.2
18-29 years	≤12.9	≤10.9
30-49 years	≤13.5	≤11.0
>49 years	≤15.2	≤13.4

Clinical Significance

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

Performing Laboratory

Cleveland HeartLab, Inc

6701 Carnegie Avenue, Suite 500

Cleveland, OH 44103-4623

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.