Protime INR

Test Code

LAB320

Alias/See Also

1231500019

CPT Codes
85610

Includes

PROTIME
INR

Preferred Specimen

Blue Top (Sodium Citrate) tube

Minimum Volume

Full Blue Top (sodium citrate) 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

Frozen (-20C or less): more than 24 hours

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

Underfilled tubes

Methodology
NR Sysmex CS2500 AR, CW, HS, MV Sysmex CA660 CW Sysmex CA660-1 FS, VB, DC, LR, HC, EL, MN, ST ACL Top 350

Reference Range

SEE RESULT REPORT

Performing Laboratory
ARKADELPHIA LABORATORY CONWAY LABORATORY FORT SMITH LABORATORY HEBER SPRINGS LABORATORY LITTLE ROCK LABORATORY NORTH LITTLE ROCK LABORATORY STUTTGART LABORATORY VAN BUREN LABORATORY MALVERN LABORATORY EL DORADO LABORATORY MAGNOLIA LABORATORY DREW COUNTY 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.