Factor VIII Activity

Test Code

LAB306

Alias/See Also

1231500007

CPT Codes
8524085390

Includes

FACTOR VIII ACTIVITY
RESULT INTERPRETATION

Preferred Specimen

Blue Top (Sodium Citrate) tube

Minimum Volume

fill to fill line on tube.

Instructions

Fully collect a Blue Top (sodium citrate) tube. Mix sample immediately by gentle inversion at least six times.

Transport Temperature

Send platelet poor plasma Frozen to -20C or less.

To obtain platelet poor plasma: Centrifuge, separate plasma, re-centrifuge, and separate plasma into a transport tube.

Specimen Stability

Refrigerated: 4 hours
Frozen: >4 hours

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Underfilled tubes will not be accepted

Methodology
ACL TOP 750

Reference Range

Males/Females:
50.0-150.0%

Performing Laboratory
LITTLE ROCK LABORATORY

Last Updated: August 26, 2026

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.