2-10 days after setup at PeaceHealth Laboratories’ reference lab.
CPT Code:
83090-90
Specimen Collection Details
Collection:
Two 5 mL aliquots from a well mixed 24-hour collection. Patient should abstain from Vitamin C ingestion 48 hours prior to collection. Do not add preservatives or acid to specimen. Also acceptable: Random samples. Refrigerate during collection.
Handling:
Record 24-hour volume on tubes.
Stability:
24 hours refrigerated or 1 month frozen. Specimen unstable ambient.
Standard Volume:
Two 5 mL aliquots.
Minimum Volume:
5 mL aliquot.
Transport:
Frozen on dry ice.
Comments:
Random samples are reported as homocysteine/creatinine ratios. Large amounts of hemoglobin or blood can interfere with quanitiation.
Rejection Criteria:
Thawed specimen; pH <5.0 or >8.0; specimen with preservatives or acid.
Homocysteine, Urine
0-32 mg/d
Homocysteine per gram of creatinine
0-53 mg/g CR
Creatinine (24-hour)
By report (reports may vary based on instrumentation)
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