Days Set Up
Monday - Saturday
Analytic Time

2 - 5 days

MiChart Code
Homocysteine, Urine
Soft Order Code
HCYSU

Test Updated:

Synonyms

HCYSU
HOMOCYSTEINE, TOTAL, URINE

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All specimens should be accompanied by a requisition.

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Test Overview

Test Methodology

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) Stable Isotope Dilution Analysis

Test Usage

Diagnosing individuals with potential increased risk factors for coronary artery disease. A functional assay for folic acid deficiency. Diagnosing homocystinuria. Plasma is the preferred specimen for cardiovascular risk factor and folate functional test. Patients with reduced renal function should be evaluated by quantitating homocysteine in the urine.

Reference Range

0 - 9 mcmol/g creatinine

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Onsite

Collect random urine specimen as follows: Discard first morning urine void following an overnight fast. Continue fasting and collect the next urine void. Place specimen on ice until it can be frozen.

Collection Offsite

Collect random urine specimen as follows: Discard first morning urine void following an overnight fast. Continue fasting and collect the next urine void. Place specimen on ice until it can be frozen. Store and transport frozen.

Normal Volume
4 mL urine
Minimum Volume
2.5 mL urine

Billing Information

CPT Code
83090
Pro Fee Code
 
LOINC
 

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.