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 66407-8: Stay was longer than 30 consecutive days last year [PhenX]

Name: LOINC Code 66407-8: Stay was longer than 30 consecutive days last year [PhenX]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:45.460Z

66407-8 is a LOINC code used to identify Stay was longer than 30 consecutive days last year [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 Stay was longer than 30 consecutive Ds last Y. 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 Stay was longer than 30 consecutive Ds last Y. 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

Stay was longer than 30 consecutive days last year [PhenX]
Stay was longer than 30 consecutive Ds last Y
Finding; Findings; Ordinal; Past; QL; Qual; Qualitative; Screen; Stay 30Ds last Y

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

Stay was longer than 30 consecutive days last year [PhenX]Stay 30Ds last Y PhenXStay was longer than 30 consecutive Ds last YPHENXFind1Y^Patient

Frequently asked questions

Code details

Code66407-8

SystemLOINC

Display nameStay was longer than 30 consecutive days last year [PhenX]

DescriptionStay was longer than 30 consecutive Ds last Y

Short nameStay 30Ds last Y PhenX

ComponentStay was longer than 30 consecutive Ds last Y

PropertyFind

Timing1Y

System (specimen)^Patient

ScaleOrd

MethodPhenX

ClassPHENX

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.38

Last changed2.65

Part names

Stay was longer than 30 consecutive Ds last YFind1Y^PatientOrdPhenXStay was longer than 30 consecutive days last yearFinding1 year

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.