Phosphorylated Tau 217 (pTau-217), Plasma-994

Test info

  
Phosphorylated Tau 217 (pTau-217), Plasma
  
994
  
LAB994
  
MSO
  
217
p-Tau217
pTau217
Tau
  

This test is used to aid in the biological identification of Alzheimer's disease by measuring phosphorylated tau 217, which has been shown in the literature to be a surrogate of amyloid pathology. Additionally, pTau-217 can be used for monitoring patients on newly approved anti-amyloid therapy.

Specimen

  
EDTA plasma
  

Lavender (EDTA), 4mL

  
1.0 mL
  
0.75 mL
  

Immediately following collection, mix sample thoroughly by gentle inverting 8 - 10 times, to prevent clotting

  
  1. Spin within 2 hours of collection
  2. Immediately transfer the plasma into a Screw-cap polypropylene frozen transport vial/tube - 4mL (LabCorp).
  3. Freeze 
  

Lavender-top (EDTA) tube

  

Frozen - 14 days

Freeze/thaw cycles - stable x3

  
  • Serum specimen
  • Improper labeling
  • Grossly hemolyzed specimen

Performance

  
LabCorp (484390); R-NX
  
5 - 7 days
  

Fujirebio Lumipulse chemiluminescent enzyme immunoassay (CLEIA)

Clinical and Interpretive info

  

See report

Billing

  
84393

Tracking

  
02/18/2026
  
02/18/2026