Lee-White Coagulation Time: No Dedicated CPT Code

The Lee-White whole blood coagulation time (capillary tube method, 37°C) is an obsolete test replaced by PT/INR, aPTT, thrombin time, and viscoelastic assays (TEG/ROTEM).

Coding

• No specific CPT code exists.
• If performed (rare, research), report 85999 (unlisted hematology/coagulation procedure) with full description.
• Do not bill with PT (85610) or aPTT (85730).

Historical Note

First global coagulation test (1913); measured time to clot in glass tube. Insensitive to factor deficiencies, lupus anticoagulant; replaced by plasma-based assays.