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 95531-0: Illegal drug use in the past year

Name: LOINC Code 95531-0: Illegal drug use in the past year
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:25.848Z

95531-0 is a LOINC code used to identify Illegal drug use in the past year 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 Illegal drug use in the past 1Y. 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 Illegal drug use in the past 1Y. 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

What it does not mean

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

Key facts

Illegal drug use in the past year
Illegal drug use in the past 1Y
Drugs; Finding; Findings; H+P; H+P.HX; Last; Ordinal; P prime; 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

Illegal drug use in the past yearIllegal drug use 1YIllegal drug use in the past 1YH&P.HXFind1Y^Patient

Frequently asked questions

Code details

Code95531-0

SystemLOINC

Display nameIllegal drug use in the past year

DescriptionIllegal drug use in the past 1Y

Short nameIllegal drug use 1Y

ComponentIllegal drug use in the past 1Y

PropertyFind

Timing1Y

System (specimen)^Patient

ScaleOrd

ClassH&P.HX

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.69

Last changed2.69

Part names

Illegal drug use in the past 1YFind1Y^PatientOrdIllegal drug use in the past yearFinding1 year

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.