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.

LOINCActiveObservation

LOINC Code 75809-4: During the past 4 weeks, what was the hardest physical activity you could do for at least 2 minutes [COOP]

Name: LOINC Code 75809-4: During the past 4 weeks, what was the hardest physical activity you could do for at least 2 minutes [COOP]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:56.383Z

75809-4 is a LOINC code used to identify During the past 4 weeks, what was the hardest physical activity you could do for at least 2 minutes [COOP] 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 the past 4Ws, what was the hardest physical activity you could do for at least 2 minutes. 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 the past 4Ws, what was the hardest physical activity you could do for at least 2 minutes. 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: COOP

What it does not mean

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

Key facts

During the past 4 weeks, what was the hardest physical activity you could do for at least 2 minutes [COOP]
During the past 4Ws, what was the hardest physical activity you could do for at least 2 minutes
4 weeks; Activ; Activity; Actvty; Exercise; II; Last; Movements; Ordinal; Ql; Qual; Qualitative; Scale; Scre; Screen; Survey

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 the past 4 weeks, what was the hardest physical activity you could do for at least 2 minutes [COOP]During the past 4Ws, what was the hardest physical activity you could do for at least 2 minutesSURVEY.COOPScore4W^PatientOrd

Frequently asked questions

Code details

Code75809-4

SystemLOINC

Display nameDuring the past 4 weeks, what was the hardest physical activity you could do for at least 2 minutes [COOP]

DescriptionDuring the past 4Ws, what was the hardest physical activity you could do for at least 2 minutes

ComponentDuring the past 4Ws, what was the hardest physical activity you could do for at least 2 minutes

PropertyScore

Timing4W

System (specimen)^Patient

ScaleOrd

MethodCOOP

ClassSURVEY.COOP

Example unitsscore

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.50

Last changed2.54

Part names

During the past 4Ws, what was the hardest physical activity you could do for at least 2 minutesScore4W^PatientOrdCOOPDuring the past 4 weeks, what was the hardest physical activity you could do for at least 2 minutes4 weeks

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.