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 81894-8: Liver ultrasound attenuation by transient elastography

Name: LOINC Code 81894-8: Liver ultrasound attenuation by transient elastography
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:05.776Z

81894-8 is a LOINC code used to identify Liver ultrasound attenuation by transient elastography 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 Ultrasound attenuation. It is commonly used with the system or sample type Liver.

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 Ultrasound attenuation. It is commonly used with the system or sample type Liver.

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: US.transient elastography

What it does not mean

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

Key facts

Liver ultrasound attenuation by transient elastography

Ultrasound attenuation

A measure of the attenuation of the ultrasound signal (loss of energy) as it travels through and returns from the liver at 3.5 MHz, often reported simultaneously with liver stiffness [LOINC77615-3]. Based on the principle that ultrasound propagation is affected by tissue fat content, the ultrasound attenuation measurement, referred to as Controlled Attenuation Parameter (CAP), is a measure of liver fat content (steatosis) and expressed in dB/m. Increasing steatosis is associated with higher levels of signal attenuation. [PMID: 22404722]

CAP; Controlled Attenuation Parameter; Echography; Fibroscan; Hepar; Hepatic; Hepatology; Imaging; Liver; Point in time; Pressure; QNT; Quan; Quant; Quantitative; RADIOLOGY; Random; Sonogram; Sonograph; Sonography; Steatosis, Liver; ULS; Ultrasound; US.TE

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

Liver ultrasound attenuation by transient elastographyUS.TE Liver attenuationUltrasound attenuationRADPresPtLiver

Frequently asked questions

Code details

Code81894-8

SystemLOINC

Display nameLiver ultrasound attenuation by transient elastography

DescriptionUltrasound attenuation

Short nameUS.TE Liver attenuation

ComponentUltrasound attenuation

PropertyPres

TimingPt

System (specimen)Liver

ScaleQn

MethodUS.transient elastography

ClassRAD

Example unitsdB/m

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.56

Last changed2.66

Part names

Ultrasound attenuationPresPtLiverQnUS.transient elastographyPressurePoint in time (spot)

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.