LOINCActiveObservation

LOINC Code 101688-0: Duration of light activity

101688-0 is a LOINC code used to identify Duration of light activity 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 Duration of light activity. 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 Duration of light activity. 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
  • Method: Measured

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • Duration of light activity
  • Activ; Activity; Actvty; Arbitrary rate; Durat; Exercise; H+P; H+P.HX; Movements; P prime; 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

Duration of light activityDur of light actH&P.HXARatPt^PatientQn

Frequently asked questions

Code details

Code101688-0
SystemLOINC
Display nameDuration of light activity
Short nameDur of light act
ComponentDuration of light activity
PropertyARat
TimingPt
System (specimen)^Patient
ScaleQn
MethodMeasured
ClassH&P.HX
Example unitsmin
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.75
Last changed2.76

Part names

Duration of light activityARatPt^PatientQnMeasuredArbitrary RatePoint 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.

LOINC Code 101688-0 | HealthAssure