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 63923-7: In the past, have you ever made a serious attempt to quit smoking That is, have you stopped smoking for at least one day or longer because you were trying to quit [PLCO]

Name: LOINC Code 63923-7: In the past, have you ever made a serious attempt to quit smoking That is, have you stopped smoking for at least one day or longer because you were trying to quit [PLCO]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:43.947Z

63923-7 is a LOINC code used to identify In the past, have you ever made a serious attempt to quit smoking That is, have you stopped smoking for at least one day or longer because you were trying to quit [PLCO] 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 In the past, have you ever made a serious attempt to quit smoking That is, have you stopped smoking for at least one day or longer because you were trying to quit. 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 In the past, have you ever made a serious attempt to quit smoking That is, have you stopped smoking for at least one day or longer because you were trying to quit. 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
Method: PLCO

What it does not mean

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

Key facts

In the past, have you ever made a serious attempt to quit smoking That is, have you stopped smoking for at least one day or longer because you were trying to quit [PLCO]
In the past, have you ever made a serious attempt to quit smoking That is, have you stopped smoking for at least one day or longer because you were trying to quit
Finding; Findings; Last; Ordinal; PhenX; Point in time; QL; Qual; Qualitative; Quit smoking attempt; Random; Screen

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

In the past, have you ever made a serious attempt to quit smoking That is, have you stopped smoking for at least one day or longer because you were trying to quit [PLCO]Quit smoking attempt PLCOIn the past, have you ever made a serious attempt to quit smoking That is, have you stopped smoking for at least one day or longer because you were trying to quitPHENXFindPt^Patient

Frequently asked questions

Code details

Code63923-7

SystemLOINC

Display nameIn the past, have you ever made a serious attempt to quit smoking That is, have you stopped smoking for at least one day or longer because you were trying to quit [PLCO]

DescriptionIn the past, have you ever made a serious attempt to quit smoking That is, have you stopped smoking for at least one day or longer because you were trying to quit

Short nameQuit smoking attempt PLCO

ComponentIn the past, have you ever made a serious attempt to quit smoking That is, have you stopped smoking for at least one day or longer because you were trying to quit

PropertyFind

TimingPt

System (specimen)^Patient

ScaleOrd

MethodPLCO

ClassPHENX

StatusACTIVE

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.65

Part names

In the past, have you ever made a serious attempt to quit smoking That is, have you stopped smoking for at least one day or longer because you were trying to quitFindPt^PatientOrdPLCOFindingPoint 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.