14-3-3 Protein, CSF (Prion Disease)

Test Code
900888

CPT Codes
83520

Includes
If 14-3-3 protein is positive or tau is ≥ 500 pg/mL, then non-orderable RT-QuiC will be performed at an additional charge (CPT code: 87999).

Preferred Specimen
5 mL CSF

Minimum Volume
1 mL

Instructions
Collect CSF by lumbar puncture. Discard first 2 mL that flows from tap. Collect next 5 mL CSF, avoiding bloody tap. Collection type: Sterile screw cap vial.

Specimen Processing: Freeze within 20 minutes of collection. Store and transport frozen. Ship using a styrofoam container with sufficient dry ice (5lbs/24 hrs). The NPDPSC requests a urine sample for research purposes with all CSF samples if available. Ship Monday through Wednesday.

Required patient information: Please complete and send the National Prion Requisition form, available on the PAML website at http://www.paml.com under the FORMS and BROCHURES link with the sample.

In addition to our Test Request Form, all senders of CSF will be required to also complete and submit our CSF Billing Requisition Form ONLY if the NPDPSC is to bill patient directly.

**Please note: Patient is also asked to submit a frozen urine sample (100-200ml) for validation of a recently published diagnostic test on Creutzfeldt-Jakob disease; no report will be issued. Please inform patient and/or family that urine is used for research on a diagnostic test and obtain oral consent.

Urine: ship double boxed using a styrofoam container with sufficient dry ice (5lbs/24 hrs).

Transport Container
Plastic screw-cap vial

Transport Temperature
Frozen

Specimen Stability
Room temperature: 20 minutes
Refrigerated: 5 days
Frozen: 1 year

Methodology
Immunoassay (IA)

Reference Range
Not applicable

Clinical Significance
Use in CSF: Search for the presence of the 14-3-3 protein. The 14-3-3 protein is a marker for some prion diseases, such as Creutzfeldt-Jakob disease (CJD), when a number of other neurodegenerative conditions are excluded.



The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.