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Kappa/Lambda Light Chains, Free(Quant)w/Ratio, Reflex to SPEP with Immunotyping if Indicated

Test Code
LAB3999


Alias/See Also
1231100410


CPT Codes
83521 (2)

Includes
KAPPA FREE LIGHT CHAINS
LAMBDA FREE LIGHT CHAINS
KAPPA/LAMBDA FREE LIGHT CHAINS RATIO


Preferred Specimen
Gold Top


Minimum Volume
1.0 mL serum


Specimen Stability
Refrigerated: 21 days
Frozen: Longer storage


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Repeat freeze/thaw cycles should be avoided to minimize potential protein degradation. Severely turbid samples should not be used.


Methodology
Abbott Alinity

Reference Range
KAPPA FREE LIGHT CHAINS
Males/Females:
2.37-20.73 mg/L
LAMBDA FREE LIGHT CHAINS
Males/Females:
4.23-27.69 mg/L
KAPPA/LAMBDA FREE LIGHT CHAINS RATIO
Males/Females:
0.22-1.74 mg/L


Performing Laboratory
LITTLE ROCK LABORATORY


Last Updated: August 26, 2026


The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.