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UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: Vitamin A

Test Code(s): VITA / HCVITA

CPT Code(s): 84590

Methodology: Liquid Chromatography

Days Performed: Mon-Fri, dayshift, as workload dictates.

Turnaround Time: Stat: Not available stat.
Routine: 2 - 7 days.

Specimen Requirements

Specimen: Blood

Patient Preparation: Patient should fast overnight for 12 hours, avoid alcohol for 12 hours, and refrain from taking daily vitamins that may contain Vitamin A prior to blood draw.

Collection Container: Preferred: Red top
Also Acceptable: Green cap with yellow ring (PST), Lavender top, Red cap with yellow ring (SST)

Collection Volume: Preferred: 2 mL
Pediatrics: 1 mL

Volume Required: Preferred: 1 mL
Pediatrics: 0.3 mL

Specimen Processing: Centrifuge. Transfer cell-free serum to plastic vial.  Refrigerate.

Specimen Transport: Transport specimen to UWHC Core Laboratory.  Transport with coolant if coming from outreach location. Specimen is stable in ambient light but exposure to direct sunlight should be avoided.

Stability: Ambient: 1 day
Refrigerated: 1 month
Frozen: 1 year


Reference Interval:
 Age:  Reference Interval:
 0-1 month  0.18-0.50 mg/L
 2 months-12 years  0.20-0.50 mg/L
 13-17 years  0.26-0.70 mg/L
 18 years and up  0.30-1.20 mg/L



 Severe Deficiency: < 0.10 mg/L
 Toxicity concerns: > 1.20 mg/L

Additional Information:

This test was developed and its performance characteristics determined by the UWHC Clinical Laboratories.  This test meets the standards for clinical testing.  This test should not be regarded as investigational or for research use.  The US Food and Drug Administration (FDA) has not approved or cleared this test; however, the FDA has determined that such clearance or approval is not necessary.


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