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 62556-6: PhenX - tobacco - age of initiation of use - adolescent protocol 030701

Name: LOINC Code 62556-6: PhenX - tobacco - age of initiation of use - adolescent protocol 030701
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:41.660Z

62556-6 is a LOINC code used to identify PhenX - tobacco - age of initiation of use - adolescent protocol 030701 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 - tobacco - age of initiation of use - adolescent protocol 030701. 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 - tobacco - age of initiation of use - adolescent protocol 030701. 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
Panel type: Panel
Method: PhenX

What it does not mean

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

Key facts

PhenX - tobacco - age of initiation of use - adolescent protocol 030701

Measurement to ascertain the respondent's age of initiation of first/regular use of cigarettes, which can be used to calculate duration of use and pack-years measures. There are two questions in this protocol. The first question is asked of respondents classified as a "Smoker" or "Non Smoker" in the Tobacco - Smoking Status (Adolescent Protocol). The second question is asked of three categories of smokers"Current Every-Day Smoker" as well as "Current Some-Day Smoker" and "Former Smoker" if these last two respondent categories had also responded "yes" to the last question in the Tobacco - Smoking Status (Adolescent Protocol).

Pan; Panel; PANEL.PHENX; Panl; Pnl; Point in time; Random; Tobac age init use adoles proto

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 - tobacco - age of initiation of use - adolescent protocol 030701Tobac age init use adoles protoPANEL.PHENX-Pt^PatientPhenX

Frequently asked questions

Code details

Code62556-6

SystemLOINC

Display namePhenX - tobacco - age of initiation of use - adolescent protocol 030701

Short nameTobac age init use adoles proto

ComponentPhenX - tobacco - age of initiation of use - adolescent protocol 030701

Property-

TimingPt

System (specimen)^Patient

Scale-

MethodPhenX

ClassPANEL.PHENX

StatusACTIVE

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.81

Part names

PhenX - tobacco - age of initiation of use - adolescent protocol 030701-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.