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LOINC Code 81184-4: Distance of tumor from circumferential resection margin LM (Spec) [Length]

81184-4 is a LOINC code used to identify Distance of tumor from circumferential resection margin LM (Spec) [Length] 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 Distance of tumor from circumferential resection margin. It is commonly used with the system or sample type Specimen.

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 Distance of tumor from circumferential resection margin. It is commonly used with the system or sample type Specimen.

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

Distance of tumor from circumferential resection margin [Length] by Microscopy
Distance of tumor from circumferential resection margin
The microscopic measurement of the distance between the tumor and circumferential resection margin (CRM). A separate macroscopic measurement (obtained with the unaided eye) [LOINC81176-0] may also be recorded. Involvement of the circumferential resection margin is an indicator of poor prognosis.
Distance Tumor from CRM; Length; LM; Micro; Micros; Microscopic; PATH.HISTO; PATHOLOGY; Point in time; QNT; Quan; Quant; Quantitative; Random; Spec

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

Distance of tumor from circumferential resection margin LM (Spec) [Length]Distance of tumor from circumferential resection margin [Length] by MicroscopyDistance Tumor from CRM MicroDistance of tumor from circumferential resection marginPATH.HISTODistance of tumor from circumferential resection margin, SpecimenLen

Frequently asked questions

Code details

Code81184-4
SystemLOINC
Display nameDistance of tumor from circumferential resection margin LM (Spec) [Length]
DescriptionDistance of tumor from circumferential resection margin
Short nameDistance Tumor from CRM Micro
ComponentDistance of tumor from circumferential resection margin
PropertyLen
TimingPt
System (specimen)Specimen
ScaleQn
MethodMicroscopy.light
ClassPATH.HISTO
Example unitsmm
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.56
Last changed2.61

Consumer names

Distance of tumor from circumferential resection margin, Specimen

Part names

Distance of tumor from circumferential resection marginLenPtSpecimenQnMicroscopy.lightLengthPoint 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.