Posted Date
Effective Date
Update Type Reference range changed
CPT Code 85730
Order Code PTT

REFERENCE RANGE CHANGE

 

PTT (Activated Partial Thromboplastin Time)

Order Code:                  PTT

Fee Code:                     31106 (CPT: 85730)

LOINC:                         14979-9

 

Effective July 31, 2025, the Coagulation Laboratory will be changing lots of reagents. This will result in reference range and critical value changes for PTT test as follows. 

 

Reference Range: 22.1 – 29.3 seconds

Critical Value:>92.6 seconds