ADAMTS13 Evaluation

Test Mnemonic


CPT Codes

  • 85335 - QTY (1)
  • 85390 - QTY (1)
  • 85397 - QTY (1)


  • ADAMTS13 Inhibitor Assay
  • ADAMTS Activity Assay

Performing Laboratory

Cleveland Clinic Laboratories

Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
2 mLPlatelet-poor plasmaSodium citrate (Lt. Blue) Frozen 


Environmental Condition Description
Ambient4 hrs.
Frozen14 days at -20 C; or 6 months at -70C

Days Performed

Mon - Fri

Turnaround Time

2 - 4 days


Name Description
Enzyme-Linked Immunosorbent Assay (ELISA) 
Fluorescence Immunoassay 

Reference Range

ADAMTS13 Activity
Sex Age From Age To Type Range Range Unit
   Years99 YearsNormal> or = 68%
   Years99 YearsUrgent<10%
ADAMTS13 Inhibitor
Sex Age From Age To Type Range Range Unit
   Years99 YearsNormal< or = 0.4Inhib Unit

Clinical Info

ADAMS13 antibody test will be performed and billed separately if the ADAMS13 Activity is <30% and ADAMTS13 inhibitor is < or = 0.4.