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.

LOINCActiveObservation

LOINC Code 18156-0: Left ventricular posterior wall Thickness during systole by US

Name: LOINC Code 18156-0: Left ventricular posterior wall Thickness during systole by US
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:27.586Z

18156-0 is a LOINC code used to identify Left ventricular posterior wall Thickness during systole by US 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 Thickness.systole. It is commonly used with the system or sample type Heart.ventricle.left.posterior wall.

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 Thickness.systole. It is commonly used with the system or sample type Heart.ventricle.left.posterior wall.

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: Observation
Method: US

What it does not mean

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

Key facts

Left ventricular posterior wall Thickness during systole by US
Thickness.systole
CARD.US; Cardiac; Cardio; Cardiology; Echography; Heart Disease; Hrt; Hrt ventr; L; Length; LT; LV; LV PW; LVPW; LVPWs; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; Sys; Syst; Thick; Thickness sys; ULS; Ultrasound; Ventricular

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

Left ventricular posterior wall Thickness during systole by USLVPW Thickness sys USThickness.systoleCARD.USLenPtHeart.ventricle.left.posterior wall

Frequently asked questions

Code details

Code18156-0

SystemLOINC

Display nameLeft ventricular posterior wall Thickness during systole by US

DescriptionThickness.systole

Short nameLVPW Thickness sys US

ComponentThickness.systole

PropertyLen

TimingPt

System (specimen)Heart.ventricle.left.posterior wall

ScaleQn

MethodUS

ClassCARD.US

Example unitsmm

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0l

Last changed2.67

Part names

Thickness.systoleLenPtHeart.ventricle.left.posterior wallQnUSThickness during systoleLengthPoint in time (spot)Heart ventricle Left posterior wallUltrasound

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.