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 86743-2: Surgical margin tumor involvement.deep LM Ql (Skin melanoma)

Name: LOINC Code 86743-2: Surgical margin tumor involvement.deep LM Ql (Skin melanoma)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:14.638Z

86743-2 is a LOINC code used to identify Surgical margin tumor involvement.deep LM Ql (Skin melanoma) 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 Surgical margin tumor involvement.deep. It is commonly used with the system or sample type Skin melanoma.

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 Surgical margin tumor involvement.deep. It is commonly used with the system or sample type Skin melanoma.

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: Microscopy.light

What it does not mean

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

Key facts

Surgical margin tumor involvement.deep [Presence] in Skin melanoma by Light microscopy
Surgical margin tumor involvement.deep
Dermatologic; Epidermis; Integument; LM; Marg tumor invol.deep; Marg tumor involve; Micro; Micros; Microscopic; Ordinal; PATHOLOGY; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Skn; Surg

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

Surgical margin tumor involvement.deep LM Ql (Skin melanoma)Surgical margin tumor involvement.deep [Presence] in Skin melanoma by Light microscopyMarg tumor invol.deep Mel Ql MicroSurgical margin tumor involvement.deepPATHSurgical margin tumor involvement.deep, Skin MelanomaPrThr

Frequently asked questions

Code details

Code86743-2

SystemLOINC

Display nameSurgical margin tumor involvement.deep LM Ql (Skin melanoma)

DescriptionSurgical margin tumor involvement.deep

Short nameMarg tumor invol.deep Mel Ql Micro

ComponentSurgical margin tumor involvement.deep

PropertyPrThr

TimingPt

System (specimen)Skin melanoma

ScaleOrd

MethodMicroscopy.light

ClassPATH

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.61

Last changed2.61

Consumer names

Surgical margin tumor involvement.deep, Skin Melanoma

Part names

Surgical margin tumor involvement.deepPrThrPtSkin melanomaOrdMicroscopy.lightPresence or ThresholdPoint in time (spot)Light microscopy

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.