Test Code IGAS IgA Subclasses, Serum
Specimen Required
Container/Tube:
Preferred: Red top
Acceptable: Serum gel
Specimen Volume: 1 mL
Useful For
Investigation of immune deficiency due to IgA2 deficiency
Evaluating patients with anaphylactic transfusion reactions
Method Name
Nephelometry
Reporting Name
IgA Subclasses, SSpecimen Type
SerumSpecimen Minimum Volume
0.5 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Serum | Refrigerated (preferred) | 7 days | |
Ambient | 7 days | ||
Frozen | 7 days |
Reject Due To
Gross hemolysis | OK |
Gross lipemia | Reject |
Gross icterus | OK |
Reference Values
IgA
0-<5 months: 7-37 mg/dL
5-<9 months: 16-50 mg/dL
9-<15 months: 27-66 mg/dL
15-<24 months: 36-79 mg/dL
2-<4 years: 27-246 mg/dL
4-<7 years: 29-256 mg/dL
7-<10 years: 34-274 mg/dL
10-<13 years: 42-295 mg/dL
13-<16 years: 52-319 mg/dL
16-<18 years: 60-337 mg/dL
≥18 years: 61-356 mg/dL
IgA1
0-<5 months: 10-34 mg/dL
5-<9 months: 14-41 mg/dL
9-<15 months: 20-50 mg/dL
15-<24 months: 24-58 mg/dL
2-<4 years: 16-162 mg/dL
4-<7 years: 17-187 mg/dL
7-<10 years: 21-221 mg/dL
10-<13 years: 27-250 mg/dL
13-<16 years: 36-275 mg/dL
16-<18 years: 44-289 mg/dL
≥18 years: 50-314 mg/dL
IgA2
0-<5 months: 0.4-5.5 mg/dL
5-<9 months: 1.5-6.2 mg/dL
9-<15 months: 2.8-7.0 mg/dL
15-<24 months: 3.9-7.7 mg/dL
2-<4 years: 1.3-31.1 mg/dL
4-<7 years: 1.1-39.1 mg/dL
7-<10 years: 1.4-48.0 mg/dL
10-<13 years: 2.6-53.4 mg/dL
13-<16 years: 4.7-55.1 mg/dL
16-<18 years: 6.6-54.3 mg/dL
≥18 years: 9.7-156.0 mg/dL
Day(s) Performed
Monday, Wednesday, Friday
Report Available
2 to 4 daysPerforming Laboratory

Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
82784
82787 x 2
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
IGAS | IgA Subclasses, S | 87552-6 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
IGA_ | IgA | 2458-8 |
IGA1_ | IgA1 | 6886-6 |
IGA2_ | IgA2 | 6939-3 |