Vitamin C

What it measures

• Vitamin CLOINC 1903-4

Before the visit

Fasting preferred

Overnight fasting is preferred. Refrain from eating fruits and from taking vitamin C supplements for 24 hours prior to collection.

Specimen

Specimen

1 mL frozen serum - protected from light

Minimum volume

0.5 mL

Also accepted

Plasma collected in: Sodium heparin (green-top) tube protected from light • Foil wrapped transport tube protected from light

Container

Amber transport tube

Temperature

Frozen -70° C

Centrifuge within 1 hour of collection. Immediately separate serum from the cells into a clean, plastic transport tube. Freeze. Protect from light. If unable to centrifuge immediately, sample should be covered with aluminum foil immediately and placed on ice until serum can be separated from cells. Transport to the laboratory frozen. For remote collection sites, or those with no access to ultra-low freezers or dry ice, it is recommended to schedule patient visits/draws after 12:00 p.m. local time and store the samples at -10° C to -30° C freezers (stable for 8 hours) until picked up by courier. Couriers should then transfer samples to -70° C storage (on dry ice) while enroute to the performing site location.

Turnaround

Set up: Tues-Sat

Billing

CPT 82180