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 54661-4: Feeling or appearing down, depressed, or hopeless in last 2 weeks.frequency [Observed PHQ-9 CMS]

Name: LOINC Code 54661-4: Feeling or appearing down, depressed, or hopeless in last 2 weeks.frequency [Observed PHQ-9 CMS]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:37.119Z

54661-4 is a LOINC code used to identify Feeling or appearing down, depressed, or hopeless in last 2 weeks.frequency [Observed PHQ-9 CMS] 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 Feeling or appearing down, depressed, or hopeless in last 2W.frequency. 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 Feeling or appearing down, depressed, or hopeless in last 2W.frequency. 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: Observed.PHQ-9.CMS

What it does not mean

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

Key facts

Feeling or appearing down, depressed, or hopeless in last 2 weeks.frequency [Observed PHQ-9 CMS]
Feeling or appearing down, depressed, or hopeless in last 2W.frequency
14 days; 2 weeks; Finding; Findings; Mental health; MentalHealth; Ordinal; Past; Patient Health Questionnaire; PHQ9; Psych; Psychiatry; Ql; Qual; Qualitative; 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

Feeling or appearing down, depressed, or hopeless in last 2 weeks.frequency [Observed PHQ-9 CMS]Feeling or appearing down, depressed, or hopeless in last 2W.frequencySURVEY.CMSFind2W^PatientOrd

Frequently asked questions

Code details

Code54661-4

SystemLOINC

Display nameFeeling or appearing down, depressed, or hopeless in last 2 weeks.frequency [Observed PHQ-9 CMS]

DescriptionFeeling or appearing down, depressed, or hopeless in last 2W.frequency

ComponentFeeling or appearing down, depressed, or hopeless in last 2W.frequency

PropertyFind

Timing2W

System (specimen)^Patient

ScaleOrd

MethodObserved.PHQ-9.CMS

ClassSURVEY.CMS

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.27

Last changed2.63

Part names

Feeling or appearing down, depressed, or hopeless in last 2W.frequencyFind2W^PatientOrdObserved.PHQ-9.CMSFeeling or appearing down, depressed, or hopeless in last 2 weeks.frequencyFinding2 weeksObserved PHQ-9 CMS

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.