LOINCActiveObservation

LOINC Code 48669-6: Albumin and Immunoglobulin Quotient (S+CSF) [Interp]

48669-6 is a LOINC code used to identify Albumin and Immunoglobulin Quotient (S+CSF) [Interp] 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 Albumin & Immunoglobulin Quotient. It is commonly used with the system or sample type Ser+CSF.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

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 Albumin & Immunoglobulin Quotient. It is commonly used with the system or sample type Ser+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

Albumin and Immunoglobulin Quotient [Interpretation] in Serum and CSF
Albumin & Immunoglobulin Quotient
Plotting the Albumin CSFSerPl-Ratio against an Ig CSF:SerPl ratio yields the quotient diagram or Reiber-diagram
Alb; Albumin & Ig Quotient; Albumin CSFSerPl vs. Ig CSF:SerPl; Both serum and cerebrospinal fluid; Cerebral spinal fluid; Cerebrospinal Fl; Chemistry; Immune globulin; Immuno; Immunoglob; Immunoglobin; Impression; Impression/interpretation of study; Impressions; Imunoglbon; Imunoglobn; Interp; Interpretation; Nominal; Point in time; Protein.albumin; Quotient-diagram; Random; Reiber plot; Reiber-diagram; Reibergram; Serum; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; SR

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.

Common synonyms

Albumin and Immunoglobulin Quotient (S+CSF) [Interp]Albumin and Immunoglobulin Quotient [Interpretation] in Serum and CSFAlbumin & Ig Quotient Ser+CSF-ImpAlbumin & Immunoglobulin QuotientCHEMAlbumin and Immunoglobulin quotient, Serum+Cerebrospinal fluidImp

Frequently asked questions

Code details

Code48669-6
SystemLOINC
Display nameAlbumin and Immunoglobulin Quotient (S+CSF) [Interp]
DescriptionAlbumin & Immunoglobulin Quotient
Short nameAlbumin & Ig Quotient Ser+CSF-Imp
ComponentAlbumin & Immunoglobulin Quotient
PropertyImp
TimingPt
System (specimen)Ser+CSF
ScaleNom
ClassCHEM
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.21
Last changed2.38

Consumer names

Albumin and Immunoglobulin quotient, Serum+Cerebrospinal fluid

Part names

Albumin & Immunoglobulin QuotientImpPtSer+CSFNomAlbumin and Immunoglobulin QuotientImpression/interpretation of studyPoint in time (spot)Serum and CSF

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.

LOINC Code 48669-6 | HealthAssure