This private blood test measures phosphorylated tau 217, a blood biomarker associated with Alzheimer's-related brain changes. The test costs £541.88, plus a £50 blood-draw fee, with results usually available in 4 weeks.
You can walk in or book online at 117a Harley Street, seven days a week.
Written by Mr Stephen Lingam. Reviewed by Dr Mohammad Bakhtiar (GMC 4694470) on 28/09/2026.
It measures phosphorylated tau 217, a blood biomarker associated with Alzheimer's-related brain changes.
The test costs £541.88. A separate £50 blood-draw fee applies.
Results are usually available in 4 weeks.
No. This blood test provides one biomarker result and should be discussed with a doctor alongside clinical assessment; it does not diagnose Alzheimer's disease on its own.