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 11840-6: Ovary - left Longitudinal diameter US

Name: LOINC Code 11840-6: Ovary - left Longitudinal diameter US
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:22.973Z

11840-6 is a LOINC code used to identify Ovary - left Longitudinal diameter US 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 Ovary.left.

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 Ovary.left.

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: US.measured

What it does not mean

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

Key facts

Ovary - left Longitudinal diameter US
Diameter.long
Longest rostral-caudal dimension. Measured in the plane that contains the longest rostral caudal diameter and, perpendicular to it, the longest dimension. between the hilum and the antimesenteric surface.
DIA; Diam; Echography; Gyn; Gynecology; L; Length; Long diameter; Longitudinal diameter; LT; OB; ObGyn; OBSTERICAL; OBSTERICAL.ULTRASOUND; Obstetrical; Obstetrics; Ovarian; ovarian length; Ovary-L; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound; US+Meas

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

Ovary - left Longitudinal diameter USOvary-L Long diameter US.measDiameter.longOB.USLenPtOvary.left

Frequently asked questions

Code details

Code11840-6

SystemLOINC

Display nameOvary - left Longitudinal diameter US

DescriptionDiameter.long

Short nameOvary-L Long diameter US.meas

ComponentDiameter.long

PropertyLen

TimingPt

System (specimen)Ovary.left

ScaleQn

MethodUS.measured

ClassOB.US

Example unitsmm;cm

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0j-a

Last changed2.54

Part names

Diameter.longLenPtOvary.leftQnUS.measuredLengthPoint in time (spot)Ovary LeftUltrasound.measured

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.