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 62641-6: PhenX - respiratory - urine assay for tobacco smoke exposure protocol 091701

Name: LOINC Code 62641-6: PhenX - respiratory - urine assay for tobacco smoke exposure protocol 091701
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:41.660Z

62641-6 is a LOINC code used to identify PhenX - respiratory - urine assay for tobacco smoke exposure protocol 091701 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 PhenX - respiratory - urine assay for tobacco smoke exposure protocol 091701. 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 PhenX - respiratory - urine assay for tobacco smoke exposure protocol 091701. 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: DISCOURAGED
Panel type: Panel
Method: PhenX

What it does not mean

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

Key facts

PhenX - respiratory - urine assay for tobacco smoke exposure protocol 091701

A biospecimen is collected from the respondent to measure cotinine, a marker of either smoking or of environmental tobacco smoke exposure. One of the most common methods is via a urine sample obtained from the respondent. Cotinine in urine is measured by gas chromatography mass spectrometry (GC-MS). Other biological matrices (blood, hair, saliva) may be used to measure cotinine. Information about collection and analysis of those matrices is found in the Supplemental InformationBlood, Hair, and Saliva Assays for Tobacco Smoke Exposure. Caffeine may interfere with the accuracy of the results. During the gas chromatography analysis, this interference can be minimized by ramping up the temperature and eluting the caffeine later than the cotinine.

Exp; Pan; Panel; PANEL.PHENX; Panl; Pnl; Point in time; Random; Resp urine assay smoke exp proto; Tob smoke exposure

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

PhenX - respiratory - urine assay for tobacco smoke exposure protocol 091701Resp urine assay smoke exp protoPANEL.PHENX-Pt^PatientPhenX

Frequently asked questions

Code details

Code62641-6

SystemLOINC

Display namePhenX - respiratory - urine assay for tobacco smoke exposure protocol 091701

Short nameResp urine assay smoke exp proto

ComponentPhenX - respiratory - urine assay for tobacco smoke exposure protocol 091701

Property-

TimingPt

System (specimen)^Patient

Scale-

MethodPhenX

ClassPANEL.PHENX

StatusDISCOURAGED

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.81

Part names

PhenX - respiratory - urine assay for tobacco smoke exposure protocol 091701-Pt^PatientPhenXPoint 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.