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 101752-4: Tau protein/Tau protein.phosphorilated 181 (CSF) [Mass ratio]

Name: LOINC Code 101752-4: Tau protein/Tau protein.phosphorilated 181 (CSF) [Mass ratio]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:17.028Z

101752-4 is a LOINC code used to identify Tau protein/Tau protein.phosphorilated 181 (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 Tau protein/Tau protein.phosphorilated 181. It is commonly used with the system or sample type 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 Tau protein/Tau protein.phosphorilated 181. 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: Both

What it does not mean

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

Key facts

Tau protein/Tau protein.phosphorilated 181 [Mass Ratio] in Cerebral spinal fluid
Tau protein/Tau protein.phosphorilated 181
Alzheimer disease; Alzheimer's disease; Cerebral spinal fluid; Cerebrospinal Fl; Chemistry; Mass concentration ratio; Mass ratio; MCRto; Point in time; PR; Prot; p-tau181; QNT; Quan; Quant; Quantitative; Random; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Tau prot/Tau prot.phos 181

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

Tau protein/Tau protein.phosphorilated 181 (CSF) [Mass ratio]Tau protein/Tau protein.phosphorilated 181 [Mass Ratio] in Cerebral spinal fluidTau Prot/p-tau181 MRto CSFTau protein/Tau protein.phosphorilated 181CHEMTau protein/Tau protein.phosphorilated 181, Spinal fluidMRto

Frequently asked questions

Code details

Code101752-4

SystemLOINC

Display nameTau protein/Tau protein.phosphorilated 181 (CSF) [Mass ratio]

DescriptionTau protein/Tau protein.phosphorilated 181

Short nameTau Prot/p-tau181 MRto CSF

ComponentTau protein/Tau protein.phosphorilated 181

PropertyMRto

TimingPt

System (specimen)CSF

ScaleQn

ClassCHEM

Example units%

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.75

Last changed2.82

Consumer names

Tau protein/Tau protein.phosphorilated 181, Spinal fluid

Part names

Tau protein/Tau protein.phosphorilated 181MRtoPtCSFQnMass RatioPoint in time (spot)Cerebral spinal fluid

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.