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 65583-7: At what time do you usually go to sleep - feel sleepy and ready to go to bed [PhenX]

Name: LOINC Code 65583-7: At what time do you usually go to sleep - feel sleepy and ready to go to bed [PhenX]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:45.456Z

65583-7 is a LOINC code used to identify At what time do you usually go to sleep - feel sleepy and ready to go to bed [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 At what time do you usually go to sleep - feel sleepy and ready to go to bed. 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 At what time do you usually go to sleep - feel sleepy and ready to go to bed. 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

At what time do you usually go to sleep - feel sleepy and ready to go to bed [PhenX]
At what time do you usually go to sleep - feel sleepy and ready to go to bed
Date and time; Point in time; QNT; Quan; Quant; Quantitative; Random; Sleep time vacation; Time stamp; Timestamp

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

At what time do you usually go to sleep - feel sleepy and ready to go to bed [PhenX]Sleep time vacation PhenXAt what time do you usually go to sleep - feel sleepy and ready to go to bedPHENXTmStpPt^Patient

Frequently asked questions

Code details

Code65583-7

SystemLOINC

Display nameAt what time do you usually go to sleep - feel sleepy and ready to go to bed [PhenX]

DescriptionAt what time do you usually go to sleep - feel sleepy and ready to go to bed

Short nameSleep time vacation PhenX

ComponentAt what time do you usually go to sleep - feel sleepy and ready to go to bed

PropertyTmStp

TimingPt

System (specimen)^Patient

ScaleQn

MethodPhenX

ClassPHENX

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.65

Part names

At what time do you usually go to sleep - feel sleepy and ready to go to bedTmStpPt^PatientQnPhenXTime Stamp (Date and Time)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.