Hepatitis B Virus Genotyping
Label Mnemonic: HBVG
Epic Lab Code: LAB3292
Downtime Form: A-1a Miscellaneous Request
Commercial Mail-out Laboratory
5231 RCP
356-8593
Specimen(s):
Plasma
Collection Medium:
Pink top tube 6 mL (K2-EDTA)
Minimum:
Preferred Minimum: 2 mL plasma
Plasma must be removed from cells within 24 hours.
Rejection Criteria:
Heparinized specimens.
Delivery Instructions:
Submit specimen to laboratory as soon as possible after collection.
Turn Around Time:
within 10 days upon receipt at reference laboratory
Reference Range:
None
Interpretive Data:
Both the HBV RT polymerase and the HBsAg encoding regions are sequenced. Resistance and surface antigen mutations are reported. In addition, the eight major HBV genotypes (A, B, C, D, E, F, G and H) are identified. Mutations in viral sub-populations below 20% of total may not be detected.
Comments:
This test may be unsuccessful if the HBV viral load is less than log 3.0 or 1,000 IU/mL of plasma.

This mailout test requires pathologist approval for orders during inpatient encounters. Mailouts staff will not process order without approval. The pathologist covering mailouts approval can be reached at pager #5379. If approval is given, the name of the pathologist can be selected in the drop-down menu to the right of the approval warning in Epic when ordering the test.
Methodology:
Polymerase Chain Reaction/Sequencing
CPT Code:
87912
 
See Additional Information:
Specimens Requiring Immediate Delivery