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Narcolepsy evaluation-994

Test info

Test name:

Narcolepsy evaluation

Test number:

994

Excellian order number:

LAB994

Abbreviation:

MSO

Useful for:

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.

Specimen

Specimen type:

EDTA whole blood

Collection container:

Lavender (EDTA), 10mL

Volume:

7 mL

Minimum volume:

3 mL

Collection instructions:

Immediatley following collection, mix sample by inverting 8 - 10 times to prevent clotting

Processing instructions:

Do not spin
Submit original tube

Transport container:

Lavender (EDTA), 10mL

Required forms/information:

Molecular Medicare Billing Request

Hospital clients submitting a request for this assay on an outpatient with Medicare should complete and submit a Molecular Medicare billing request form to notify us of the need for Allina Health Laboratory to bill insurance.

Transport and stability:

Ambient (strict) – 7 days

Refrigerated – NO

Frozen – NO

Reason for rejection:

Incorrect specimen container (tube type)
Yellow-top (ACD) tube

Performance

Performing lab:

LabCorp (167655): R-NX

Days set up:

Varies

TAT:

3 - 7 days

Method:

Next-generation sequencing or other methods as needed

Clinical and Interpretive info

Reference ranges:

Reported as positive or negative
An interpretive report will be included

Billing

Preauthorization:

This test may require preauthorization from the insurance provider. Check the payer guidelines and, if needed, obtain the pre-authorization prior to sample collection.

CPT codes:

81383 x 2

Subject to medical necessity (Y/N):

Yes

Other billing information:

Medical necessity

Molecular Medicare Billing Request

Tracking

Date created:

11/09/2021

Revised date:

02/25/2026

Review date:

02/25/2026