LOINC

LOINC Code 58307-0: Date of onset of chest discomfort

58307-0 is a LOINC code used to identify Date of onset of chest discomfort 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 Date of onset of chest discomfort. 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 Date of onset of chest discomfort. 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

  • Date of onset of chest discomfort
  • PhenX; Point in time; QNT; Quan; Quant; Quantitative; Random

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

Date of onset of chest discomfortPHENXDatePt^PatientQnPoint in time (spot)

Frequently asked questions

Code details

Code58307-0
SystemLOINC
Display nameDate of onset of chest discomfort
Short nameDate of onset of chest discomfort
ComponentDate of onset of chest discomfort
PropertyDate
TimingPt
System (specimen)^Patient
ScaleQn
ClassPHENX
Example unitsMMDDYY
StatusTRIAL

Flags

BillableNo
Valid clinical useNo

Source

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

Part names

Date of onset of chest discomfortDatePt^PatientQnPoint 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.

LOINC Code 58307-0 | HealthAssure