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 104663-0: Tau protein.phosphorylated 217 IA [Mass/Vol]

Name: LOINC Code 104663-0: Tau protein.phosphorylated 217 IA [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:19.128Z

104663-0 is a LOINC code used to identify Tau protein.phosphorylated 217 IA [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 217. It is commonly used with the system or sample type Ser/Plas.

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 217. It is commonly used with the system or sample type Ser/Plas.

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

Tau protein.phosphorylated 217 [Mass/volume] in Serum or Plasma by Immunoassay
Tau protein.phosphorylated 217
Alzheimer disease; Alzheimer's disease; Chemistry; EIA; ELFA; ELISA; Enzyme immunoassay; IAA; Level; Mass concentration; MEIA; Pl; Plasma; Plsm; Point in time; PR; Prot; p-tau217; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; SUDS

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.phosphorylated 217 IA [Mass/Vol]Tau protein.phosphorylated 217 [Mass/volume] in Serum or Plasma by Immunoassayp-tau217 SerPl IA-mCncTau protein.phosphorylated 217CHEMTau protein.phosphorylated 217, BloodMCnc

Frequently asked questions

Code details

Code104663-0

SystemLOINC

Display nameTau protein.phosphorylated 217 IA [Mass/Vol]

DescriptionTau protein.phosphorylated 217

Short namep-tau217 SerPl IA-mCnc

ComponentTau protein.phosphorylated 217

PropertyMCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

MethodIA

ClassCHEM

Example unitspg/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.78

Last changed2.79

Consumer names

Tau protein.phosphorylated 217, Blood

Part names

Tau protein.phosphorylated 217MCncPtSer/PlasQnIAMass ConcentrationPoint in time (spot)Serum or PlasmaImmunoassay

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.