LOINCActiveObservation

LOINC Code 20304-2: Right ventricular Minor axis.maximum [Length] by US 2D

20304-2 is a LOINC code used to identify Right ventricular Minor axis.maximum [Length] by US 2D 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 Minor axis.max. It is commonly used with the system or sample type Heart.ventricle.right.

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 Minor axis.max. It is commonly used with the system or sample type Heart.ventricle.right.

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.2D

What it does not mean

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

Key facts

  • Right ventricular Minor axis.maximum [Length] by US 2D
  • Minor axis.max
  • 2D US; CARD.US; Cardiac; Cardio; Cardiology; Echography; Heart Disease; Hrt; Hrt ventr; Largest; Length; Maximal; Maximum; Peak; Point in time; QNT; Quan; Quant; Quantitative; R; Random; RT; RV; SAX; short axis; Sonogram; Sonograph; Sonography; ULS; Ultrasound; Ultrasound - 2-dimensional; 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

Right ventricular Minor axis.maximum [Length] by US 2DRV Minor axis.max 2D USMinor axis.maxCARD.USLenPtHeart.ventricle.right

Frequently asked questions

Code details

Code20304-2
SystemLOINC
Display nameRight ventricular Minor axis.maximum [Length] by US 2D
DescriptionMinor axis.max
Short nameRV Minor axis.max 2D US
ComponentMinor axis.max
PropertyLen
TimingPt
System (specimen)Heart.ventricle.right
ScaleQn
MethodUS.2D
ClassCARD.US
Example unitscm
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0m
Last changed2.48

Part names

Minor axis.maxLenPtHeart.ventricle.rightQnUS.2DLengthPoint in time (spot)Heart.ventricle RightUltrasound 2D

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.

LOINC Code 20304-2 | HealthAssure