Ordering RecommendationRecommendations when to order or not order the test. May include related or preferred tests.
Aid in evaluation and management of multiple myeloma and related plasma cell disorders. Indicated for the diagnosis of patients with oligosecretory or nonsecretory multiple myeloma and light chain amyloidosis.
MnemonicUnique test identifier.
KAP/LAM F
MethodologyProcess(es) used to perform the test.
Quantitative Immunoturbidimetry
PerformedDays of the week the test is performed.
Sun-Sat
ReportedExpected turnaround time for a result, beginning when ARUP has received the specimen.
1-4 days
New York DOH Approval StatusIndicates test has been approved by the New York State Department of Health.
This test is New York DOH approved.
Specimen Required
Patient Preparation
Collect
Serum Separator Tube (SST).
Specimen Preparation
Separate from cells ASAP or within 2 hours of collection. Transfer 2 mL serum to an ARUP Standard Transport Tube. (Min: 0.5 mL)
Storage/Transport Temperature
Refrigerated.
Unacceptable Conditions
Plasma.
Remarks
Stability
After separation from cells: Ambient: Unacceptable; Refrigerated: 3 weeks; Frozen: 6 months
Reference IntervalNormal range/expected value(s) for a specific disease state. May also include abnormal ranges.
Test Number
Components
Reference Interval
Lambda Qnt Free Light Chains
Effective February 18, 2020 5.71-26.30 mg/L
Kappa Qnt Free Light Chains
Effective February 18, 2020 3.30 - 19.40 mg/L
Kappa/Lambda Free Light Chain Ratio
0.26-1.65
Interpretive DataBackground information for test. May include disease information, patient result explanation, recommendations, details of testing, associated diseases, explanation of possible patient results.
Undetected antigen excess is a rare event but cannot be excluded. Free light chain results should always be interpreted in conjunction with other clinical and laboratory findings.
Compliance Category
FDA
NoteAdditional information related to the test.
This assay is highly sensitive to increasing concentrations of monoclonal free kappa or free lambda light chains in the serum of patients with evolving or relapsing myelomas.
CPT CodesThe American Medical Association Current Procedural Terminology (CPT) codes published in ARUP's Laboratory Test Directory are provided for informational purposes only. The codes reflect our interpretation of CPT coding requirements based upon AMA guidelines published annually. CPT codes are provided only as guidance to assist clients with billing. ARUP strongly recommends that clients confirm CPT codes with their Medicare administrative contractor, as requirements may differ. CPT coding is the sole responsibility of the billing party. ARUP Laboratories assumes no responsibility for billing errors due to reliance on the CPT codes published.
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
AliasesOther names that describe the test. Synonyms.
Kappa Qnt Free Light Chains
Kappa/Lambda Free Light Chain Ratio
Lambda Qnt Free Light Chains
Kappa/Lambda Quantitative Free Light Chains with Ratio, Serum
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