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.

LOINCActive

LOINC Code 51999-1: Ambulance transport, Time ambulance arrived at scene Date and time

Name: LOINC Code 51999-1: Ambulance transport, Time ambulance arrived at scene Date and time
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:35.574Z

51999-1 is a LOINC code used to identify Ambulance transport, Time ambulance arrived at scene Date and time 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 Time ambulance arrived at scene. It is commonly used with the system or sample type Ambulance transport.

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 Time ambulance arrived at scene. It is commonly used with the system or sample type Ambulance transport.

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

What it does not mean

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

Key facts

Ambulance transport, Time ambulance arrived at scene Date and time
Time ambulance arrived at scene
ATTACH; ATTACH.AMB; Date and time; Point in time; QNT; Quan; Quant; Quantitative; Random; 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

Ambulance transport, Time ambulance arrived at scene Date and timeTime ambulance arrived at sceneATTACH.AMBTmStpPtAmbulance transportQn

Frequently asked questions

Code details

Code51999-1

SystemLOINC

Display nameAmbulance transport, Time ambulance arrived at scene Date and time

DescriptionTime ambulance arrived at scene

ComponentTime ambulance arrived at scene

PropertyTmStp

TimingPt

System (specimen)Ambulance transport

ScaleQn

ClassATTACH.AMB

StatusACTIVE

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.24

Last changed2.27

Part names

Time ambulance arrived at sceneTmStpPtAmbulance transportQnTime 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.