Narcolepsy Evaluation (DQA1, DQB1)

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Turnaround Time: 3 - 7 days
CPT Code:


Test Type: 7 mL or four buccal swabs


HLA DQB1*06:02 and HLA DQA1*01:02 are associated statistically with narcolepsy and are sometimes used as tests in support of that diagnosis.

Even with appropriate precautions, an occasional specimen may not be satisfactory for testing. In such cases, fresh specimens should be collected for retesting. Narcolepsy-associated HLA alleles are not diagnostic, but they are useful in stratifying risk.

Mignot E, Lin L, Rogers W, et al. Complex HLA-DR and -DQ interactions confer risk of narcolepsy-cataplexy in three ethnic groups. Am J Hum Genet. 2000 Mar; 68(3):686-699. PubMed 11179016

Collection Details:

Collection Instructions:


Lavender-top (EDTA) tube or four buccal swabs in a sealed envelope (buccal swab kit). If submitting buccal swabs, please use the kit provided by LabCorp.

Maintain specimen at room temperature. Protect from extreme heat or cold.