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 65379-0: Each time you have a severe headache, how long are you unable to work or undertake normal activities [PhenX]

Name: LOINC Code 65379-0: Each time you have a severe headache, how long are you unable to work or undertake normal activities [PhenX]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:44.551Z

65379-0 is a LOINC code used to identify Each time you have a severe headache, how long are you unable to work or undertake normal activities [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 Each time you have a severe headache, how long are you unable to work or undertake normal activities. 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 Each time you have a severe headache, how long are you unable to work or undertake normal activities. 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

Each time you have a severe headache, how long are you unable to work or undertake normal activities [PhenX]
Each time you have a severe headache, how long are you unable to work or undertake normal activities
Control; How long unable to work; Job; Occupation; 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

Each time you have a severe headache, how long are you unable to work or undertake normal activities [PhenX]How long unable to work PhenXEach time you have a severe headache, how long are you unable to work or undertake normal activitiesPHENXTimePt^Patient

Frequently asked questions

Code details

Code65379-0

SystemLOINC

Display nameEach time you have a severe headache, how long are you unable to work or undertake normal activities [PhenX]

DescriptionEach time you have a severe headache, how long are you unable to work or undertake normal activities

Short nameHow long unable to work PhenX

ComponentEach time you have a severe headache, how long are you unable to work or undertake normal activities

PropertyTime

TimingPt

System (specimen)^Patient

ScaleQn

MethodPhenX

ClassPHENX

Example unitsD, W, Mo, Y

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.65

Part names

Each time you have a severe headache, how long are you unable to work or undertake normal activitiesTimePt^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.