Ordering Recommendation

Carrier screening or diagnostic testing for Tay-Sachs disease in individuals of Ashkenazi Jewish or French-Canadian descent.

New York DOH Approval Status

This test is New York state approved.

Specimen Required

Patient Preparation
Collect

Lavender (EDTA), pink (K2EDTA), or yellow (ACD Solution A or B).

Specimen Preparation

Transport 3 mL whole blood. (Min: 1 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Specimens collected in sodium heparin or lithium heparin tubes. Frozen specimens in glass collection tubes.

Remarks
Stability

Ambient: 72 hours; Refrigerated: 1 week; Frozen: 1 month

Methodology

Polymerase Chain Reaction (PCR), Fluorescence Monitoring

Performed

Varies

Reported

5-10 days

Reference Interval

By report

Interpretive Data

Refer to report

Counseling and informed consent are recommended for genetic testing. Consent forms are available online.

Compliance Category

Laboratory Developed Test (LDT)

Note

Hotline History

N/A

CPT Codes

81255

Components

Component Test Code* Component Chart Name LOINC
0051430 Tay-Sachs Disease (HEXA), Allele 1 38900-7
0051431 Tay-Sachs Disease (HEXA), Allele 2 38900-7
0051432 Tay-Sachs Disease (HEXA), Interpretation 51773-0
2001315 Tay-Sachs Disease (HEXA), Specimen 31208-2
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.

Aliases

  • Hexosaminidase A
  • Hexosaminidase A Deficiency DNA assay
  • TSD molecular assay
Tay-Sachs Disease (HEXA), 7 Variants