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Geisinger Medical Laboratories Test Catalog
HLA-A29 DETERMINATION |
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Geisinger Epic Procedure Code: LAB2474
Geisinger Epic ID: 41910
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SPECIMEN COLLECTION |
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Specimen type: |
Whole blood | |
Preferred collection container: |
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Specimen required: |
15 mL whole blood (5 mL minimum) | |
Special notes: |
A separate EDTA (lavender-top) tube must be submitted for all HLA testing. If submitted with any other test requiring an EDTA tube, please submit a separate tube for this test. Do not open tube. | |
| SPECIMEN PROCESSING |
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Transport temperature: |
Room temperature. | |
Specimen stability: |
Room temperature: 14 days. Refrigerated or frozen: Unacceptable. | |
Rejection criteria: |
Refrigerated or frozen specimen. Specimen collected in heparinized tube. | |
TEST DETAILS |
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CPT code(s): |
81374 | |
| Note: The billing party has sole responsibility for CPT coding. Any questions regarding coding should be directed to the payer being billed. The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only. | ||
Methodology: |
Polymerase Chain Reaction Amplification/Sequence Specific Oligonucleotide Probes (PCR-SSO) |
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Synonyms: |
Birdshot retinochoroidopathy, BSCR HLA-A29 DNA typing Quest test code 16773 HLAA29
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Clinical significance: |
Birdshot retinochoroidopathy (BSCR) is a rare posterior uveitis characterized by distinctive, multiple, hypopigmented choroidal and retinal lesions. More than 97% of BSCR patients carry HLA-A29. The frequency of HLA-A29 in the general US population is 8%. Together with clinical manifestations, HLA-A29 typing is used for diagnosis of BSCR. | |