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 72260-3: Phosphorylated tau 181 IA (CSF) [Mass/Vol]

Name: LOINC Code 72260-3: Phosphorylated tau 181 IA (CSF) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:51.524Z

72260-3 is a LOINC code used to identify Phosphorylated tau 181 IA (CSF) [Mass/Vol] 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.phosphorylated 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.phosphorylated 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
Method: IA

What it does not mean

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

Key facts

Phosphorylated tau 181 [Mass/volume] in Cerebral spinal fluid by Immunoassay
Tau protein.phosphorylated 181
181P; Alzheimer disease; Alzheimer's disease; Cerebral spinal fluid; Cerebrospinal Fl; Chemistry; EIA; ELFA; ELISA; Enzyme immunoassay; IAA; Level; Mass concentration; MEIA; Neuro; Neurology; phospho T181; Point in time; PR; Prot; p-tau181; pThr181; QNT; Quan; Quant; Quantitative; Random; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; SUDS; Thr181; threonine 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

Phosphorylated tau 181 IA (CSF) [Mass/Vol]Phosphorylated tau 181 [Mass/volume] in Cerebral spinal fluid by Immunoassayp-tau181 CSF IA-mCncTau protein.phosphorylated 181CHEMPhosphorylated tau 181, Spinal fluidMCnc

Frequently asked questions

Code details

Code72260-3

SystemLOINC

Display namePhosphorylated tau 181 IA (CSF) [Mass/Vol]

DescriptionTau protein.phosphorylated 181

Short namep-tau181 CSF IA-mCnc

ComponentTau protein.phosphorylated 181

PropertyMCnc

TimingPt

System (specimen)CSF

ScaleQn

MethodIA

ClassCHEM

Example unitspg/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.42

Last changed2.73

Consumer names

Phosphorylated tau 181, Spinal fluid

Part names

Tau protein.phosphorylated 181MCncPtCSFQnIAPhosphorylated tau 181Mass ConcentrationPoint in time (spot)Cerebral spinal fluidImmunoassay

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.