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Test Code Billings Clinic: 4059 Hepatitis Bs Antigen (HBsAg), Serum

Performing Laboratory

Billings Clinic Laboratory: Chemistry

 

See “Viral Hepatitis Serologic Profiles—Billings Clinic Laboratory” under Resources

Useful For

  • Diagnosis of acute, recent, or chronic hepatitis B infection
  • Determination of chronic hepatitis B infection status

 

Methodology

Billings Clinic - Chemiluminescence Microparticle Immunoassay (CMIA)

Mayo - Chemiluminescence Immunoassay

Specimen Requirements

Serum should be physically separated from cells as soon as possible with a maximum limit of two hours from the time of collection.

 

  • Draw blood in a serum gel tube(s).
  • Spin down and send 2 mL of serum frozen in plastic vial.
  • Draw date is required on request form for processing.

Storage/Stability

Specimen Type Temperature Time
Serum Refrigerated 2 weeks
  Frozen (preferred) 1 month
  Ambient 24 hours

 

Reject Due To

  • Heat-inactivated specimen
  • Grossly hemolyzed specimen

Reference Values

Nonreactive (reported as nonreactive)
 

Automatic call-back:  all reactive results confirmed by neutralization

Day(s) Test Set Up

Daily

Test Classification and CPT Coding

87340 - HBsAg

87341 - HBsAg confirmation (if appropriate)

LOINC Code Information

Reporting Name OINC Code
HBsAg 5196-1

 

Profile/Testing Information

Profile Information:
Hepatitis Bs Antigen (HBsAg)
Reflex Tests (at an additional charge):
Hepatitis B Surface Antigen (Mayo Confirmation)

 

Reflex Information:

  • If Billings Clinic: #4059 “Hepatitis Bs Antigen (HBsAg), Serum” is positive; #8406 “Hepatitis B Surface Antigen, Serum” will be performed, by Mayo Medical Laboratories.
  • This test may automatically reflex to other tests. An additional fee may be added.

The ordering physician/provider must indicate if the reflex test is NOT DESIRED.