LOINC

LOINC Code 58304-7: Chest discomfort ever or since last exam or medical history update

58304-7 is a LOINC code used to identify Chest discomfort ever or since last exam or medical history update 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 Chest discomfort ever or since last exam or medical history update. 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 Chest discomfort ever or since last exam or medical history update. 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

What it does not mean

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

Key facts

  • Chest discomfort ever or since last exam or medical history update
  • Chest discomfort ever/since last exam; Date and time; Hx; Ordinal; Past; PhenX; Point in time; QL; Qual; Qualitative; Random; Screen; Time stamp; Timestamp

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

Chest discomfort ever or since last exam or medical history updateChest discomfort ever/since last examPHENXTmStpPt^PatientOrd

Frequently asked questions

Code details

Code58304-7
SystemLOINC
Display nameChest discomfort ever or since last exam or medical history update
Short nameChest discomfort ever/since last exam
ComponentChest discomfort ever or since last exam or medical history update
PropertyTmStp
TimingPt
System (specimen)^Patient
ScaleOrd
ClassPHENX
StatusTRIAL

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.30
Last changed2.65

Part names

Chest discomfort ever or since last exam or medical history updateTmStpPt^PatientOrdTime Stamp (Date and Time)Point 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.