LOINCActiveObservation

LOINC Code 77157-6: EMS Response mode descriptors NEMSIS

77157-6 is a LOINC code used to identify EMS Response mode descriptors NEMSIS 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 Response mode descriptors. It is commonly used with the system or sample type EMS response.

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 Response mode descriptors. It is commonly used with the system or sample type EMS response.

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
  • Method: NEMSIS

What it does not mean

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

Key facts

  • EMS Response mode descriptors NEMSIS
  • Response mode descriptors
  • The documentation of response mode techniques, such as lights and sirens, used for the EMS response. This includes information on whether the EMS event was schedule or unscheduled.
  • Emergency Medical Service(s); National EMS Information Services; Nominal; Point in time; Random; Typ

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

EMS Response mode descriptors NEMSISResponse mode descriptorsNEMSISTypePtEMS responseNom

Frequently asked questions

Code details

Code77157-6
SystemLOINC
Display nameEMS Response mode descriptors NEMSIS
DescriptionResponse mode descriptors
Short nameEMS Response mode descriptors NEMSIS
ComponentResponse mode descriptors
PropertyType
TimingPt
System (specimen)EMS response
ScaleNom
MethodNEMSIS
ClassNEMSIS
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.52
Last changed2.52

Part names

Response mode descriptorsTypePtEMS responseNomNEMSISPoint in time (spot)National EMS Information Services

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 77157-6 | HealthAssure