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 64257-9: In the past year, have you been to the emergency room or hospitalized for lung problems [PhenX]

Name: LOINC Code 64257-9: In the past year, have you been to the emergency room or hospitalized for lung problems [PhenX]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:43.949Z

64257-9 is a LOINC code used to identify In the past year, have you been to the emergency room or hospitalized for lung problems [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 In the past Y, have you been to the emergency room or hospitalized for lung problems. 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 In the past Y, have you been to the emergency room or hospitalized for lung problems. 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

In the past year, have you been to the emergency room or hospitalized for lung problems [PhenX]
In the past Y, have you been to the emergency room or hospitalized for lung problems
Finding; Findings; Hx ER hospitalized lung problems; Last; Ordinal; Ql; Qual; Qualitative; Screen

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

In the past year, have you been to the emergency room or hospitalized for lung problems [PhenX]Hx ER hospitalized lung problems PhenXIn the past Y, have you been to the emergency room or hospitalized for lung problemsPHENXFind1Y^Patient

Frequently asked questions

Code details

Code64257-9

SystemLOINC

Display nameIn the past year, have you been to the emergency room or hospitalized for lung problems [PhenX]

DescriptionIn the past Y, have you been to the emergency room or hospitalized for lung problems

Short nameHx ER hospitalized lung problems PhenX

ComponentIn the past Y, have you been to the emergency room or hospitalized for lung problems

PropertyFind

Timing1Y

System (specimen)^Patient

ScaleOrd

MethodPhenX

ClassPHENX

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.65

Part names

In the past Y, have you been to the emergency room or hospitalized for lung problemsFind1Y^PatientOrdPhenXIn the past year, have you been to the emergency room or hospitalized for lung problemsFinding1 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.