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LOINC Code 104165-6: Aortic valve Orifice area/Body surface area [Area/Area] by US 2D

104165-6 is a LOINC code used to identify Aortic valve Orifice area/Body surface area [Area/Area] 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 Orifice area/Body surface area. It is commonly used with the system or sample type Aortic valve.

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 Orifice area/Body surface area. It is commonly used with the system or sample type Aortic valve.

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: Both
  • Method: US.2D

What it does not mean

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

Key facts

  • Aortic valve Orifice area/Body surface area [Area/Area] by US 2D
  • Orifice area/Body surface area
  • 2D US; AO; AoV; AV; AVA; Bdy surface; bod; Bodies; BSA; CARD.US; Cardiology; Echography; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; Surf; ULS; Ultrasound; Ultrasound - 2-dimensional

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

Aortic valve Orifice area/Body surface area [Area/Area] by US 2DAV Orifice area/BSA 2D USOrifice area/Body surface areaCARD.USArAreaPtAortic valve

Frequently asked questions

Code details

Code104165-6
SystemLOINC
Display nameAortic valve Orifice area/Body surface area [Area/Area] by US 2D
DescriptionOrifice area/Body surface area
Short nameAV Orifice area/BSA 2D US
ComponentOrifice area/Body surface area
PropertyArArea
TimingPt
System (specimen)Aortic valve
ScaleQn
MethodUS.2D
ClassCARD.US
Example unitscm2/m2
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.77
Last changed2.77

Part names

Orifice area/Body surface areaArAreaPtAortic valveQnUS.2DArea/AreaPoint in time (spot)Ultrasound 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.