Beta-thalassemia: HBB (Full gene sequencing)-994

Test info

  
Beta-thalassemia: HBB (Full gene sequencing)
  
994
  
LAB994
  
MSO
  
β-Thalassemia
  
  • Confirm a clinical diagnosis of β-thalassemia
  • Detect carriers
  • Help to establish a prognosis
  

This method does not reliably detect mosaic variants, large deletions, large duplications, inversions, or other rearrangements or deep intronic variants. It may be affected by allele-dropout, may not allow determination of the exact numbers of T/A or microsatellite repeats and it does not allow any conclusion as to whether two heterozygous variants are present on the same or on different chromosome copies.

Specimen

  
EDTA whole blood
  
  
7 mL
  
3 mL
  

Immediately following collection, mix sample thoroughly by gentle inverting 8 - 10 times, to prevent clotting

  

Lavender (EDTA), 10mL

  

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.

  

Ambient

  
  • Container broken or leaking
  • Container not labeled or label not legible
  • Use of improper anticoagulant
  • Frozen specimen
  • Hemolysis
  • Quantity not sufficient for analysis
  • Improper container

Performance

  
LabCorp RTP (252823): R-NX
  
As needed, upon receipt
  
16 - 28 days
  

DNA sequencing

 

Clinical and Interpretive info

  

Normal equals reference sequence or variants that are known or predicted to be benign.

Abnormal equals all other variants.

  

This test covers all coding nucleotides of gene HBB, plus at least two and typically 20 flanking intronic nucleotides upstream and downstream of each coding exon, covering the conserved donor and acceptor splice sites, as well as typically 20 flanking nucleotides in the 5′ and 3′ UTR.

Test orders must include an attestation that the provider has the patient's informed consent for genetic testing.

Billing

  
Pre-authorization This test may require preauthorization from the insurance provider. Check the payer guidelines and, if needed, obtain the pre-authorization prior to sample collection.
  
81364
  
Yes
  
Result 21689-5
  

Medical necessity

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.

Molecular Medicare billing request

Tracking

  
07/03/2019
  
05/15/2024
  
12/27/2023