LOINCActiveObservation

LOINC Code 9894-7: P wave amplitude in lead III

9894-7 is a LOINC code used to identify P wave amplitude in lead III 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 P wave amplitude.lead III. It is commonly used with the system or sample type Heart.

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 P wave amplitude.lead III. It is commonly used with the system or sample type Heart.

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: EKG

What it does not mean

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

Key facts

  • P wave amplitude in lead III
  • P wave amplitude.lead III
  • 3; Cardiac; Cardio; Cardiology; ECG; EKG.MEASUREMENTS; Electrical potential; Electrocardiogram; Electrocardiograph; Heart Disease; Hrt; P prime; P' wave Amp L-III; P wave Amp L-III; Painter's colic; PB; Plumbism; Point in time; QNT; Quan; Quant; Quantitative; Random; Voltage

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

P wave amplitude in lead IIIP wave Amp L-IIIP wave amplitude.lead IIIEKG.MEASElpotPtHeart

Frequently asked questions

Code details

Code9894-7
SystemLOINC
Display nameP wave amplitude in lead III
DescriptionP wave amplitude.lead III
Short nameP wave Amp L-III
ComponentP wave amplitude.lead III
PropertyElpot
TimingPt
System (specimen)Heart
ScaleQn
MethodEKG
ClassEKG.MEAS
Example unitsmV
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0i
Last changed2.48

Part names

P wave amplitude.lead IIIElpotPtHeartQnEKGElectrical Potential (Voltage)Point in time (spot)Electrocardiogram (EKG)

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.