LOINCActiveObservation

LOINC Code 18025-7: Heart Diameter anterior-posterior systole/Aortic root diameter by US

18025-7 is a LOINC code used to identify Heart Diameter anterior-posterior systole/Aortic root diameter by 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 Diameter.anterior-posterior.systole/Diameter.aorta root. It is commonly used with the system or sample type Heart.

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 Diameter.anterior-posterior.systole/Diameter.aorta root. It is commonly used with the system or sample type Heart.

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

What it does not mean

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

Key facts

  • Heart Diameter anterior-posterior systole/Aortic root diameter by US
  • Diameter.anterior-posterior.systole/Diameter.aorta root
  • APAD; CARD.US; Cardiac; Cardio; Cardiology; DIA; Diam; Diam AO root; Diam AP; Diam AP sys; Echography; Heart Disease; Hrt; Length Ratio; OA root; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; Sys; Syst; ULS; Ultrasound

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

Heart Diameter anterior-posterior systole/Aortic root diameter by USHrt Diam AP sys/OA root USDiameter.anterior-posterior.systole/Diameter.aorta rootCARD.USLenRtoPtHeart

Frequently asked questions

Code details

Code18025-7
SystemLOINC
Display nameHeart Diameter anterior-posterior systole/Aortic root diameter by US
DescriptionDiameter.anterior-posterior.systole/Diameter.aorta root
Short nameHrt Diam AP sys/OA root US
ComponentDiameter.anterior-posterior.systole/Diameter.aorta root
PropertyLenRto
TimingPt
System (specimen)Heart
ScaleQn
MethodUS
ClassCARD.US
Example unitsratio
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Part names

Diameter.anterior-posterior.systole/Diameter.aorta rootLenRtoPtHeartQnUSLength RatioPoint in time (spot)Ultrasound

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 18025-7 | HealthAssure