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 64493-0: During your waking time, do you feel tired, fatigued, or not up to par [PhenX]

Name: LOINC Code 64493-0: During your waking time, do you feel tired, fatigued, or not up to par [PhenX]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:43.951Z

64493-0 is a LOINC code used to identify During your waking time, do you feel tired, fatigued, or not up to par [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 During your waking time, do you feel tired, fatigued, or not up to par. 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 During your waking time, do you feel tired, fatigued, or not up to par. 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

During your waking time, do you feel tired, fatigued, or not up to par [PhenX]
During your waking time, do you feel tired, fatigued, or not up to par
Finding; Findings; Ordinal; Point in time; QL; Qual; Qualitative; Random; Screen; Sleep apnea tired waking

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

During your waking time, do you feel tired, fatigued, or not up to par [PhenX]Sleep apnea tired waking PhenXDuring your waking time, do you feel tired, fatigued, or not up to parPHENXFindPt^Patient

Frequently asked questions

Code details

Code64493-0

SystemLOINC

Display nameDuring your waking time, do you feel tired, fatigued, or not up to par [PhenX]

DescriptionDuring your waking time, do you feel tired, fatigued, or not up to par

Short nameSleep apnea tired waking PhenX

ComponentDuring your waking time, do you feel tired, fatigued, or not up to par

PropertyFind

TimingPt

System (specimen)^Patient

ScaleOrd

MethodPhenX

ClassPHENX

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.65

Part names

During your waking time, do you feel tired, fatigued, or not up to parFindPt^PatientOrdPhenXFindingPoint 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.