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.

LOINC

LOINC Code 63629-0: On the number of days you reported you smoked cigarettes during the past 30 days, how many cigarettes did you smoke per day, on average [PhenX]

Name: LOINC Code 63629-0: On the number of days you reported you smoked cigarettes during the past 30 days, how many cigarettes did you smoke per day, on average [PhenX]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:42.802Z

63629-0 is a LOINC code used to identify On the number of days you reported you smoked cigarettes during the past 30 days, how many cigarettes did you smoke per day, on average [PhenX] 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 On the number of D you reported you smoked cigarettes during the past 30D, how many cigarettes did you smoke per D, on average. 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 On the number of D you reported you smoked cigarettes during the past 30D, how many cigarettes did you smoke per D, on average. 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: TRIAL
Method: PhenX

What it does not mean

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

Key facts

On the number of days you reported you smoked cigarettes during the past 30 days, how many cigarettes did you smoke per day, on average [PhenX]
On the number of D you reported you smoked cigarettes during the past 30D, how many cigarettes did you smoke per D, on average
30Dquantity; Dextro; Finding; Findings; Last; No; Num; Ordinal; Ql; Qual; Qualitative; 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

On the number of days you reported you smoked cigarettes during the past 30 days, how many cigarettes did you smoke per day, on average [PhenX]30Dquantity PhenXOn the number of D you reported you smoked cigarettes during the past 30D, how many cigarettes did you smoke per D, on averagePHENXFind30D^Patient

Frequently asked questions

Code details

Code63629-0

SystemLOINC

Display nameOn the number of days you reported you smoked cigarettes during the past 30 days, how many cigarettes did you smoke per day, on average [PhenX]

DescriptionOn the number of D you reported you smoked cigarettes during the past 30D, how many cigarettes did you smoke per D, on average

Short name30Dquantity PhenX

ComponentOn the number of D you reported you smoked cigarettes during the past 30D, how many cigarettes did you smoke per D, on average

PropertyFind

Timing30D

System (specimen)^Patient

ScaleOrd

MethodPhenX

ClassPHENX

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.65

Part names

On the number of D you reported you smoked cigarettes during the past 30D, how many cigarettes did you smoke per D, on averageFind30D^PatientOrdPhenXOn the number of days you reported you smoked cigarettes during the past 30 days, how many cigarettes did you smoke per day, on averageFinding30 days

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.