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Immunofixation, Urine
Test Code213
CPT Codes
86335
Includes
CPT code 81050 may be added at an additional charge for volume measurement
Preferred Specimen
25 mL random urine no preservative, or
25 mL of a 24-hour urine collected in a plastic screw-cap container, no preservative, or
25 mL urine collected in a urinalysis transport tube (yellow-top, blue fill line, preservative) tube
25 mL of a 24-hour urine collected in a plastic screw-cap container, no preservative, or
25 mL urine collected in a urinalysis transport tube (yellow-top, blue fill line, preservative) tube
Minimum Volume
15 mL
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 5 days
Refrigerated: 7 days
Frozen: 30 days
Refrigerated: 7 days
Frozen: 30 days
Methodology
Immunofixation
Setup Schedule
Sun-Fri
Report Available
1 to 3 Day(s)
Clinical Significance
Immunofixation of urine is useful in evaluation of monoclonal free light chains and other monoclonal gammopathies seen in light chain disease, multiple myeloma, Waldenstrom's macroglobulinemia, amyloidosis, and other lymphoproliferative disorders. Increased polyclonal free light chains in urine may be seen in glomerular leak syndromes and in infection or inflammation.