Glial Fibrillary Acidic Protein (GFAP)
Quest Diagnostics
Sample type: Plasma
Requires fasting: No
Phlebotomy required
Details
Glial Fibrillary Acidic Protein (GFAP) - Glial fibrillary acidic protein (GFAP) is a protein expressed in astrocytes, cells that support neurons and help form the blood-brain barrier, found within the central nervous system (CNS), and is involved in several important CNS processes.
- Glial Fibrillary Acidic Protein (GFAP)
Estimated days for results: Results should be available in 2 - 5 business days after the sample is collected
1. Nature Reviews Neurology 18(3):158-172.
2. J Neuro Sci 35 (1):147-155.
3. Molecular Psychiatry 5(2):142-149.
2–5 business days
<20 years Not Established
20–39 years <68.9 pg/mL
40–49 years <74.2 pg/mL
50–59 years <86.5 pg/mL
≥60 years <156.9 pg/mL
Blood Draw Options with Fullscript
Fullscript offers several convenient phlebotomy options to complete your lab testing:
Quest Diagnostics Patient Service Centers (PSC)
- Location: Visit a nearby Quest Diagnostics Patient Service Center.
- Cost: $10 sample collection fee (paid during lab order checkout).
- Scheduling: Schedule your appointment here. Appointments are recommended to reduce wait times. Walk-ins are accepted, but may experience delays. Aim to arrive 10 minutes before your appointment.
- Collection Instructions:
- Bring a valid ID.
- Bring your digital or printed requisition form, available in the Labs tab of your Fullscript account.
- Check-in: Scan the QR code from your confirmation email or follow kiosk instructions.
- More Info: Quest Diagnostics blood draw guide
Getlabs Mobile Phlebotomy
- Location: Sample collection at your home or office.
- Cost: $85 sample collection fee (paid during lab order checkout).
- Availability: Available in most locations – enter your ZIP code during checkout to confirm.
- Scheduling: Schedule your appointment here through your Fullscript account.
- Collection Instructions:
- Have your digital or printed requisition form and valid ID ready.
- Your phlebotomist will contact you by phone to coordinate arrival.
- More Info: Getlabs blood draw guide
- Preferred Specimen(s): 0.7 mL plasma collected in an EDTA (lavender-top) tube
- Alternative: NA
- Minimum Volume: 0.5 mL
- Collection Instructions: NA
- Transport Container: Transport tube
- Transport Temperature: Room Temperature
- Specimen Stability:
- Room temperature: 43 days
- Refrigerated: 43 days
- Frozen: 40 days
- Reject Criteria: NA
State restrictions:
Patient can't order this test if they are located in Hawaii, Puerto Rico, New Jersey, New York, or Rhode Island
