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 95494-1: Substances used during the past 3 months

Name: LOINC Code 95494-1: Substances used during the past 3 months
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:25.848Z

95494-1 is a LOINC code used to identify Substances used during the past 3 months 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 Substances used during the past 3Mo. 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 Substances used during the past 3Mo. 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

Substances used during the past 3 months
Substances used during the past 3Mo
H+P; H+P.HX; Last; Nominal; P prime; Point in time; Random; Substances used past 3Mo; Typ

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

Substances used during the past 3 monthsSubstances used past 3MoSubstances used during the past 3MoH&P.HXTypePt^Patient

Frequently asked questions

Code details

Code95494-1

SystemLOINC

Display nameSubstances used during the past 3 months

DescriptionSubstances used during the past 3Mo

Short nameSubstances used past 3Mo

ComponentSubstances used during the past 3Mo

PropertyType

TimingPt

System (specimen)^Patient

ScaleNom

ClassH&P.HX

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.69

Last changed2.69

Part names

Substances used during the past 3MoTypePt^PatientNomSubstances used during the past 3 monthsPoint 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.