CPT® 83521, Under Chemistry Procedures
The Current Procedural Terminology (CPT®) code 83521 as maintained by American Medical Association, is a medical procedural code under the range - Chemistry Procedures.
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Summary
The lab analyst performs a chemistry test to measure the level of each immunoglobulin light chain, kappa or lambda, in a serum specimen. A common lab method for this test is turbidimetry, which uses light absorption to measure the level of a targeted solid suspended in a liquid. Levels of free (unbound) kappa and lambda in a serum specimen can help clinicians diagnose and monitor certain plasma–cell disorders such as multiple myeloma (MM) and primary amyloidosis (AL).
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