LOINCActiveObservation

LOINC Code 99681-9: Pacemaker Atrial wire

99681-9 is a LOINC code used to identify Pacemaker Atrial wire 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 Atrial wire. It is commonly used with the system or sample type Pacemaker.

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 Atrial wire. It is commonly used with the system or sample type Pacemaker.

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

  • Pacemaker Atrial wire
  • Atrial wire
  • Cardiac pacemaker; Cnt; Count; Device, Heart-Assist; Number; Point in time; Prosthetic; 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

Pacemaker Atrial wireAtrial wireDEVICESNumPtPacemakerQn

Frequently asked questions

Code details

Code99681-9
SystemLOINC
Display namePacemaker Atrial wire
DescriptionAtrial wire
Short namePacemaker Atrial wire
ComponentAtrial wire
PropertyNum
TimingPt
System (specimen)Pacemaker
ScaleQn
ClassDEVICES
Example units#
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.72
Last changed2.72

Part names

Atrial wireNumPtPacemakerQnNumber (count)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.

LOINC Code 99681-9 | HealthAssure