What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActive

LOINC Code 8579-5: Systolic blood pressure Posterior tibial artery - left/Brachial artery

Name: LOINC Code 8579-5: Systolic blood pressure Posterior tibial artery - left/Brachial artery
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:13.316Z

8579-5 is a LOINC code used to identify Systolic blood pressure Posterior tibial artery - left/Brachial artery 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.posterior tibial artery left/Brachial artery. It is commonly used with the system or sample type Peripheral vascular system.

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.posterior tibial artery left/Brachial artery. It is commonly used with the system or sample type Peripheral vascular system.

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

Systolic blood pressure Posterior tibial artery - left/Brachial artery
Intravascular systolic.posterior tibial artery left/Brachial artery
ABR; Ankle brachial ratio; BLOOD PRESSURE MEASUREMENTS.MOLEC; BP; BP sys; BP sys post TA; BP sys post TA-l; Brach a; Cardio; Cardiology; Heart Disease; Intravenous; IV; L; LT; Periph; Point in time; PressureRatio; QNT; Quan; Quant; Quantitative; Random

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

Systolic blood pressure Posterior tibial artery - left/Brachial arteryBP sys post TA-l/Brach aIntravascular systolic.posterior tibial artery left/Brachial arteryBP.MOLECPresRtoPtPeripheral vascular system

Frequently asked questions

Code details

Code8579-5

SystemLOINC

Display nameSystolic blood pressure Posterior tibial artery - left/Brachial artery

DescriptionIntravascular systolic.posterior tibial artery left/Brachial artery

Short nameBP sys post TA-l/Brach a

ComponentIntravascular systolic.posterior tibial artery left/Brachial artery

PropertyPresRto

TimingPt

System (specimen)Peripheral vascular system

ScaleQn

ClassBP.MOLEC

Example unitsratio

StatusACTIVE

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0h(3)

Last changed2.48

Part names

Intravascular systolic.posterior tibial artery left/Brachial arteryPresRtoPtPeripheral vascular systemQnPressure RatioPoint in time (spot)

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.