Activated Partial Thromboplastin Time (APTT), Plasma

Test is performed at local Kansas City communities only. 

Test Code

CPT Codes

Preferred Specimen

Specimen Type: Whole Blood

Collection Container/Tube: Light-blue top (3.2% sodium citrate)

Specimen Volume: Properly filled 9:1 ratio (blood to anticoagulant); 3.2% NaCitrate tube

Shipping Requirements: Ambient (Room Temperature)


Specimen Stability
Specimen Type Temperature Time
Whole Blood Ambient 4 hours
Plasma Frozen  14 days



Reference Range

> 95 seconds

Clinical Significance

The activated partial thromboplastin time (PTT) is a basic coagulation screening test for the assessment of congenital and acquired deficiencies of the intrinsic and common pathways (PK, HMWK, factors XII, XI, IX, VIII, X, V, II, I)

Performed By
EmpowerMe Diagnostics

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.