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 3144-3: Last menstrual period duration

Name: LOINC Code 3144-3: Last menstrual period duration
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:17.664Z

3144-3 is a LOINC code used to identify Last menstrual period duration 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 Menstrual period duration.last. It is commonly used with the system or sample type ^Patient.

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 Menstrual period duration.last. It is commonly used with the system or sample type ^Patient.

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: Stated

What it does not mean

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

Key facts

Last menstrual period duration
Menstrual period duration.last
Durat; Gyn; Gynecology; LMP duration; OB; OBGYN; Obstetrics; Past; Point in time; Random

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

Last menstrual period durationLMP durationMenstrual period duration.lastOBGYNTimePt^Patient

Frequently asked questions

Code details

Code3144-3

SystemLOINC

Display nameLast menstrual period duration

DescriptionMenstrual period duration.last

Short nameLMP duration

ComponentMenstrual period duration.last

PropertyTime

TimingPt

System (specimen)^Patient

ScaleOrdQn

MethodStated

ClassOBGYN

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.73

Part names

Menstrual period duration.lastTimePt^PatientOrdQnStatedTime (e.g. seconds)Point 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.