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 57226-3: Longitudinal diameter Pressure injury.largest stage 3 or 4 [OASIS-C]

Name: LOINC Code 57226-3: Longitudinal diameter Pressure injury.largest stage 3 or 4 [OASIS-C]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:38.756Z

57226-3 is a LOINC code used to identify Longitudinal diameter Pressure injury.largest stage 3 or 4 [OASIS-C] 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 Diameter.long. It is commonly used with the system or sample type Pressure injury.largest stage 3 or 4.

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 Diameter.long. It is commonly used with the system or sample type Pressure injury.largest stage 3 or 4.

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
Method: OASIS-C

What it does not mean

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

Key facts

Longitudinal diameter Pressure injury.largest stage 3 or 4 [OASIS-C]
Diameter.long
DIA; Diam; III; Length; Long diameter; Longitudinal diameter; Outcome and assessment information set; Point in time; Pressure ulcer; Pressure Ulcers; QNT; Quan; Quant; Quantitative; Random; Survey; Survey.OASIS; Ulcer

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

Longitudinal diameter Pressure injury.largest stage 3 or 4 [OASIS-C]Diameter.longSURVEY.OASISLenPtPressure injury.largest stage 3 or 4Qn

Frequently asked questions

Code details

Code57226-3

SystemLOINC

Display nameLongitudinal diameter Pressure injury.largest stage 3 or 4 [OASIS-C]

DescriptionDiameter.long

ComponentDiameter.long

PropertyLen

TimingPt

System (specimen)Pressure injury.largest stage 3 or 4

ScaleQn

MethodOASIS-C

ClassSURVEY.OASIS

Example unitscm

StatusACTIVE

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.29

Last changed2.63

Part names

Diameter.longLenPtPressure injury.largest stage 3 or 4QnOASIS-CLengthPoint 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.