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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.

Limitations:

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.

Specimen

Specimen type:

EDTA whole blood

Collection container:

Lavender (EDTA), 10mL

Volume:

7 mL

Minimum volume:

3.0 mL

Collection instructions:

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

Processing instructions:

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

Transport container:

Lavender (EDTA), 10mL

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 (167139): R-NX

Days set up:

Varies

TAT:

7 days

Method:

Polymerase chain reaction (PCR)/sequence-specific oligonucleotide probes (Luminex®)

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

Hospital clients submitting a request for this assay on an outpatient with Medicare should complete and submit a Molecular Medical billing request form along with the sample.

Complete and submit the form to notify us of the need for Allina Health Laboratory to bill insurance for Molecular testing performed
All information requested is required in order for your request to be completed

Molecular Medicare billing request

Tracking

Date created:

11/09/2021

Revised date:

06/23/2023

Review date:

12/21/2023