What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 1756-6: Albumin in CSF/Albumin in Serum or Plasma (S/P+CSF) [Relative ratio]

Name: LOINC Code 1756-6: Albumin in CSF/Albumin in Serum or Plasma (S/P+CSF) [Relative ratio]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:26.982Z

1756-6 is a LOINC code used to identify Albumin in CSF/Albumin in Serum or Plasma (S/P+CSF) [Relative 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 Albumin.CSF/Albumin.SerPl. It is commonly used with the system or sample type Ser/Plas+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.CSF/Albumin.SerPl. It is commonly used with the system or sample type Ser/Plas+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: Both

What it does not mean

The code identifies the observation or test, not the actual result.

Key facts

Albumin in CSF/Albumin in Serum or Plasma

Albumin.CSF/Albumin.SerPl

The albumin quotient (AQ; CSF albumin/serum or plasma albumin x 100) is an important measurement to quantify the blood-brain barrier function. Normal function of the AQ barrier depends on the age of the patient; in newborns, a higher permeability may be observed.

Alb; Alb CSF; Albumin CSFSerPl; Albumin quotient; AQ; Cerebral spinal fluid; Cerebrospinal Fl; Chemistry; Pl; Plasma; Plsm; Point in time; Protein.albumin; Qalb; QNT; Quan; Quant; Quantitative; Random; Relative ratio; SerP; SerPl; SerPl+CSF; SerPlas; Serum; Serum or plasma; 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 in CSF/Albumin in Serum or Plasma (S/P+CSF) [Relative ratio]Albumin in CSF/Albumin in Serum or PlasmaAlb CSF/SerPlAlbumin.CSF/Albumin.SerPlCHEMAlbumin in CSF/Albumin in Serum Or Plasma, S/P+CSFRelRto

Frequently asked questions

Code details

Code1756-6

SystemLOINC

Display nameAlbumin in CSF/Albumin in Serum or Plasma (S/P+CSF) [Relative ratio]

DescriptionAlbumin.CSF/Albumin.SerPl

Short nameAlb CSF/SerPl

ComponentAlbumin.CSF/Albumin.SerPl

PropertyRelRto

TimingPt

System (specimen)Ser/Plas+CSF

ScaleQn

ClassCHEM

Example unitsRatio

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.73

Consumer names

Albumin in CSF/Albumin in Serum Or Plasma, S/P+CSF

Part names

Albumin.CSF/Albumin.SerPlRelRtoPtSer/Plas+CSFQnRelative RatioPoint in time (spot)Serum or Plasma 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.