Test Overview
Test Methodology
Chemiluminescent Enzyme Immunoassay
Test Usage
Evaluation of individuals, aged 50 years and older, presenting with cognitive impairment who are being assessed for Alzheimer disease and other causes of cognitive decline
Reference Range *
Negative: < or =0.185 pg/mL; Intermediate: 0.186-0.324 pg/mL; Positive: > or =0.325 pg/mL
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Test Limitations
This test is not intended as a screening test for Alzheimer disease in asymptomatic individuals.
Test Details
Days Set Up
Tuesday, Thursday
Analytic Time
2 - 6 days
Soft Order Code
PT217
Synonyms
- p-tau 217
Laboratory
Sendout
Reference Laboratory
Mayo (PT217)
Section
Special Testing
Specimen Requirements
Collection Instructions
Collect specimen in an EDTA lavender top tube. Spin, and aliquot into a screw capped plastic tube. Send to Specimen Processing refrigerated.
Normal Volume
0.6 mL plasma
Minimum Volume
0.5 mL plasma
Storage Temperature
Refrigerated preferred, frozen acceptable
Additional Information
Test performed by Mayo Clinic Laboratories
Billing
CPT Code
84393
Fee Code
AB177
NY State Approved
No