LOINCActive

LOINC Code 8423-6: Ascending thoracic aorta Systolic blood pressure

8423-6 is a LOINC code used to identify Ascending thoracic aorta Systolic blood pressure 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 Intravascular systolic. It is commonly used with the system or sample type Aorta.thoracic.ascending.

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 Intravascular systolic. It is commonly used with the system or sample type Aorta.thoracic.ascending.

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

What it does not mean

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

Key facts

  • Ascending thoracic aorta Systolic blood pressure
  • Intravascular systolic
  • AO; Ao asc; Aortic; ATA; Blood pressure; BLOOD PRESSURE MEASUREMENTS.CENTRAL.MOLEC; Blood pressure systolic; BP; BP sys; BP systolic; Cardio; Cardiology; Heart Disease; Intravenous; IV; Point in time; Pressure; QNT; Quan; Quant; Quantitative; Random; SBP; Sys BP; Thorax

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

Ascending thoracic aorta Systolic blood pressureATA BP sysIntravascular systolicBP.CENT.MOLECPresPtAorta.thoracic.ascending

Frequently asked questions

Code details

Code8423-6
SystemLOINC
Display nameAscending thoracic aorta Systolic blood pressure
DescriptionIntravascular systolic
Short nameATA BP sys
ComponentIntravascular systolic
PropertyPres
TimingPt
System (specimen)Aorta.thoracic.ascending
ScaleQn
ClassBP.CENT.MOLEC
Example unitsmm Hg
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0h(2)
Last changed2.54

Part names

Intravascular systolicPresPtAorta.thoracic.ascendingQnPressurePoint in time (spot)Aorta thoracic ascending

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.