LOINCActiveObservation

LOINC Code 20209-3: Ventricular Cardiac output by US.2D+Calculated by modified Simpson method

20209-3 is a LOINC code used to identify Ventricular Cardiac output by US.2D+Calculated by modified Simpson method 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 Cardiac output. It is commonly used with the system or sample type Heart.ventricle.XXX.

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 Cardiac output. It is commonly used with the system or sample type Heart.ventricle.XXX.

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+Calculated by modified Simpson method

What it does not mean

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

Key facts

  • Ventricular Cardiac output by US.2D+Calculated by modified Simpson method
  • Cardiac output
  • 2D US; Calc; Calculation; CARD.US; Cardiac; Cardio; Cardiology; CO; Echography; Flow; Heart Disease; Hrt; Hrt ventr; Misc; Miscellaneous; Other; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; Spec; To be specified in another part of the message; ULS; Ultrasound; Ultrasound - 2-dimensional; Unspecified; US.2D+mod Simpson; Ventricular; Volume rate; vRate

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

Ventricular Cardiac output by US.2D+Calculated by modified Simpson methodHrt ventr Output US.2D+mod SimpsonCardiac outputCARD.USVRatPtHeart.ventricle.XXX

Frequently asked questions

Code details

Code20209-3
SystemLOINC
Display nameVentricular Cardiac output by US.2D+Calculated by modified Simpson method
DescriptionCardiac output
Short nameHrt ventr Output US.2D+mod Simpson
ComponentCardiac output
PropertyVRat
TimingPt
System (specimen)Heart.ventricle.XXX
ScaleQn
MethodUS.2D+Calculated by modified Simpson method
ClassCARD.US
Example unitsL/min
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0m
Last changed2.52

Part names

Cardiac outputVRatPtHeart.ventricle.XXXQnUS.2D+Calculated by modified Simpson methodVolume RatePoint in time (spot)Heart ventricle XXX

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 20209-3 | HealthAssure