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 66470-6: How long ago has it been since you last used a needle to inject a drug not prescribed by a doctor [PhenX]

Name: LOINC Code 66470-6: How long ago has it been since you last used a needle to inject a drug not prescribed by a doctor [PhenX]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:46.209Z

66470-6 is a LOINC code used to identify How long ago has it been since you last used a needle to inject a drug not prescribed by a doctor [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 How long ago has it been since you last used a needle to inject a drug not prescribed by a doctor. 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 How long ago has it been since you last used a needle to inject a drug not prescribed by a doctor. 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

How long ago has it been since you last used a needle to inject a drug not prescribed by a doctor [PhenX]
How long ago has it been since you last used a needle to inject a drug not prescribed by a doctor
Drugs; How long since last injected; NDL; Past; Point in time; QNT; Quan; Quant; Quantitative; Random

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

How long ago has it been since you last used a needle to inject a drug not prescribed by a doctor [PhenX]How long since last injected PhenXHow long ago has it been since you last used a needle to inject a drug not prescribed by a doctorPHENXTimePt^Patient

Frequently asked questions

Code details

Code66470-6

SystemLOINC

Display nameHow long ago has it been since you last used a needle to inject a drug not prescribed by a doctor [PhenX]

DescriptionHow long ago has it been since you last used a needle to inject a drug not prescribed by a doctor

Short nameHow long since last injected PhenX

ComponentHow long ago has it been since you last used a needle to inject a drug not prescribed by a doctor

PropertyTime

TimingPt

System (specimen)^Patient

ScaleQn

MethodPhenX

ClassPHENX

Example unitsmo

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.38

Last changed2.65

Part names

How long ago has it been since you last used a needle to inject a drug not prescribed by a doctorTimePt^PatientQnPhenXTime (e.g. seconds)Point 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.