Test Code SM Sm Antibodies, IgG, Serum
Specimen Required
Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Specimen Volume: 0.5 mL
Secondary ID
81358Useful For
Evaluating patients with signs and symptoms of a connective tissue disease in whom the test for antinuclear antibodies is positive
Testing for Sm antibodies is not useful in patients without demonstrable antinuclear antibodies.
Testing Algorithm
See Connective Tissue Disease Cascade (CTDC) in Special Instructions.
Special Instructions
Method Name
Multiplex Flow Immunoassay
Reporting Name
Sm Ab, IgG, SSpecimen Type
SerumSpecimen Minimum Volume
0.35 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Serum | Refrigerated (preferred) | 21 days | |
Frozen | 21 days |
Reject Due To
Gross hemolysis | Reject |
Gross lipemia | Reject |
Gross icterus | OK |
Reference Values
<1.0 U (negative)
≥1.0 U (positive)
Reference values apply to all ages.
Day(s) and Time(s) Performed
Monday through Saturday; 4 p.m.
Performing Laboratory

Test Classification
This test has been cleared, approved or is exempt by the U.S. 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
86235
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
SM | Sm Ab, IgG, S | 18323-6 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
SM | Sm Ab, IgG, S | 18323-6 |