LOINCActiveObservation

LOINC Code 93645-0: Left ventricular Ejection fraction by US.2D.A4C+Calc by single plane area-length method

93645-0 is a LOINC code used to identify Left ventricular Ejection fraction by US.2D.A4C+Calc by single plane area-length 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 Ejection fraction. It is commonly used with the system or sample type Heart.ventricle.left.

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 Ejection fraction. It is commonly used with the system or sample type Heart.ventricle.left.

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.A4C+Calc by single plane area-length method

What it does not mean

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

Key facts

  • Left ventricular Ejection fraction by US.2D.A4C+Calc by single plane area-length method
  • Ejection fraction
  • 2D US; A4C SP A-L; Calculated; CARD.US; Cardiac; Cardiology; Echography; EF; Frac; Fract; Fractionation; Fractions; Hrt; Hrt ventr; L; LT; LV; LVEF; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound; Ultrasound - 2-dimensional; Ventricular; Volfr; Volume fraction

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 Ejection fraction by US.2D.A4C+Calc by single plane area-length methodLV EF A4C SP A-LEjection fractionCARD.USVFrPtHeart.ventricle.left

Frequently asked questions

Code details

Code93645-0
SystemLOINC
Display nameLeft ventricular Ejection fraction by US.2D.A4C+Calc by single plane area-length method
DescriptionEjection fraction
Short nameLV EF A4C SP A-L
ComponentEjection fraction
PropertyVFr
TimingPt
System (specimen)Heart.ventricle.left
ScaleQn
MethodUS.2D.A4C+Calc by single plane area-length method
ClassCARD.US
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.67
Last changed2.67

Part names

Ejection fractionVFrPtHeart.ventricle.leftQnUS.2D.A4C+Calc by single plane area-length methodVolume FractionPoint in time (spot)Heart ventricle - left

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 93645-0 | HealthAssure