LOINCActiveObservation

LOINC Code 18815-1: Ambulance transport, Reason for scheduled trip additional service information (narrative)

18815-1 is a LOINC code used to identify Ambulance transport, Reason for scheduled trip additional service information (narrative) 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 Reason for scheduled trip additional service information. 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 Reason for scheduled trip additional service information. 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
  • Order vs observation: Observation

What it does not mean

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

Key facts

  • Ambulance transport, Reason for scheduled trip additional service information (narrative)
  • Reason for scheduled trip additional service information
  • Add; ATTACH; ATTACH.AMB; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Narrative; Point in time; Random; Reason for scheduled trip addl service information; Report

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, Reason for scheduled trip additional service information (narrative)Reason for scheduled trip additional service informationATTACH.AMBImpPtAmbulance transportNar

Frequently asked questions

Code details

Code18815-1
SystemLOINC
Display nameAmbulance transport, Reason for scheduled trip additional service information (narrative)
DescriptionReason for scheduled trip additional service information
ComponentReason for scheduled trip additional service information
PropertyImp
TimingPt
System (specimen)Ambulance transport
ScaleNar
ClassATTACH.AMB
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.27

Part names

Reason for scheduled trip additional service informationImpPtAmbulance transportNarImpression/interpretation of studyPoint 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.