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 44629-4: Specimen size.maximum dimension (Breast tumor) [Length]

Name: LOINC Code 44629-4: Specimen size.maximum dimension (Breast tumor) [Length]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:30.172Z

44629-4 is a LOINC code used to identify Specimen size.maximum dimension (Breast tumor) [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 Specimen size.max dimension. It is commonly used with the system or sample type Breast tumor.

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 Specimen size.max dimension. It is commonly used with the system or sample type Breast tumor.

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

What it does not mean

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

Key facts

Specimen size.maximum dimension in Breast tumor
Specimen size.max dimension
Brst; BT; Cancer; Largest; Length; Maximal; Maximum; Pathology; PATHOLOGY PROTOCOLS; PATHOLOGY PROTOCOLS BREAST; Peak; Point in time; QNT; Quan; Quant; Quantitative; Random; Size.max.dim; Spec; Spec size.max dim; tumors; tumour; tumours

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

Specimen size.maximum dimension (Breast tumor) [Length]Specimen size.maximum dimension in Breast tumorSpec size.max dim BTSpecimen size.max dimensionPATH.PROTOCOLS.BRSTSpecimen size.maximum dimension, Breast TumorLen

Frequently asked questions

Code details

Code44629-4

SystemLOINC

Display nameSpecimen size.maximum dimension (Breast tumor) [Length]

DescriptionSpecimen size.max dimension

Short nameSpec size.max dim BT

ComponentSpecimen size.max dimension

PropertyLen

TimingPt

System (specimen)Breast tumor

ScaleQn

ClassPATH.PROTOCOLS.BRST

Example unitscm

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.17

Last changed2.70

Consumer names

Specimen size.maximum dimension, Breast Tumor

Part names

Specimen size.max dimensionLenPtBreast tumorQnLengthPoint 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.