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.

LOINCActiveObservation

LOINC Code 99539-9: Stenosis degree Autopsy (Mid left anterior descending artery) [Length fraction]

Name: LOINC Code 99539-9: Stenosis degree Autopsy (Mid left anterior descending artery) [Length fraction]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:33.065Z

99539-9 is a LOINC code used to identify Stenosis degree Autopsy (Mid left anterior descending artery) [Length fraction] 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 Stenosis degree. It is commonly used with the system or sample type Mid left anterior descending artery.

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 Stenosis degree. It is commonly used with the system or sample type Mid left anterior descending artery.

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: Autopsy

What it does not mean

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

Key facts

Stenosis degree [Length fraction] in Mid left anterior descending artery by Autopsy
Stenosis degree
Art; Coronary segment 7; L; Length Fraction; LT; mLAD; PATHOLOGY; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Sten deg

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

Stenosis degree Autopsy (Mid left anterior descending artery) [Length fraction]Stenosis degree [Length fraction] in Mid left anterior descending artery by AutopsySten deg LenFr mLAD AutopsyStenosis degreePATHStenosis degree, Mid Left Anterior Descending ArteryLenFr

Frequently asked questions

Code details

Code99539-9

SystemLOINC

Display nameStenosis degree Autopsy (Mid left anterior descending artery) [Length fraction]

DescriptionStenosis degree

Short nameSten deg LenFr mLAD Autopsy

ComponentStenosis degree

PropertyLenFr

TimingPt

System (specimen)Mid left anterior descending artery

ScaleQn

MethodAutopsy

ClassPATH

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.72

Last changed2.72

Consumer names

Stenosis degree, Mid Left Anterior Descending Artery

Part names

Stenosis degreeLenFrPtMid left anterior descending arteryQnAutopsyLength fractionPoint 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.