LOINC Code 48776-9: Immunoglobulin light chains.kappa.free/Immunoglobulin light chains.lambda.free (CSF) [Mass ratio]
48776-9 is a LOINC code used to identify Immunoglobulin light chains.kappa.free/Immunoglobulin light chains.lambda.free (CSF) [Mass ratio] in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Immunoglobulin light chains.kappa.free/Immunoglobulin light chains.lambda.free. It is commonly used with the system or sample type CSF.
What is this code?
LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Immunoglobulin light chains.kappa.free/Immunoglobulin light chains.lambda.free. It is commonly used with the system or sample type CSF.
When is it used?
- Used in lab systems, EHRs, and clinical data exchange.
- May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
- Status: ACTIVE
- Order vs observation: Observation
What it does not mean
- The code identifies the observation or test, not the actual result.
Key facts
- Kappa light chains.free/Lambda light chains.free [Mass Ratio] in Cerebral spinal fluid
- Immunoglobulin light chains.kappa.free/Immunoglobulin light chains.lambda.free
- Bence Jones protein; BJ Protein; BJP; Cerebral spinal fluid; Cerebrospinal Fl; Chain; Chemistry; FR; Immune globulin; Immuno; Immunoglob; Immunoglobin; Imunoglbon; Imunoglobn; Kappa LC; Kappa LC Free; Lambda Free; Lambda LC; Lambda LC Free; Mass concentration ratio; Mass ratio; MCRto; Non-protein bound; Point in time; QNT; Quan; Quant; Quantitative; Random; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid
Where you may see this code
You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.
Related SNOMED CT concepts
Related observations and tests
Common synonyms
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.