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 12149-1: Fetal Interventricular septum Thickness diastolic Measured by real time two dimension US

Name: LOINC Code 12149-1: Fetal Interventricular septum Thickness diastolic Measured by real time two dimension US
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:22.974Z

12149-1 is a LOINC code used to identify Fetal Interventricular septum Thickness diastolic Measured by real time two dimension 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.diastolic. It is commonly used with the system or sample type Heart.interventricular septum^Fetus.

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.diastolic. It is commonly used with the system or sample type Heart.interventricular septum^Fetus.

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.measured.real time two dimension

What it does not mean

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

Key facts

Fetal Interventricular septum Thickness diastolic Measured by real time two dimension US
Thickness.diastolic
2; Cardiac; Cardio; Cardiology; Dias; Diast; Diastoli; Echography; Fetal; Gyn; Gynecology; Heart Disease; Hrt; Hrt.IVS^Fetus; IS; IVS; IVSd; Length; OB; ObGyn; OBSTERICAL; OBSTERICAL.ULTRASOUND; Obstetrical; Obstetrics; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; Thick; Thickness dias; ULS; Ultrasound; US.meas.RT 2D; US+Meas

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

Fetal Interventricular septum Thickness diastolic Measured by real time two dimension USFet IVS Thickness dias US.meas.RT 2DThickness.diastolicOB.USLenPtHeart.interventricular septum^fetus

Frequently asked questions

Code details

Code12149-1

SystemLOINC

Display nameFetal Interventricular septum Thickness diastolic Measured by real time two dimension US

DescriptionThickness.diastolic

Short nameFet IVS Thickness dias US.meas.RT 2D

ComponentThickness.diastolic

PropertyLen

TimingPt

System (specimen)Heart.interventricular septum^Fetus

ScaleQn

MethodUS.measured.real time two dimension

ClassOB.US

Example unitsmm

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0j-a

Last changed2.48

Part names

Thickness.diastolicLenPtHeart.interventricular septum^fetusQnUS.measured.real time two dimensionThickness diastolicLengthPoint 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.