LOINCActiveObservation

LOINC Code 82337-7: Right atrial Intrachamber pressure estimated by US

82337-7 is a LOINC code used to identify Right atrial Intrachamber pressure estimated by US 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 Intrachamber. It is commonly used with the system or sample type Heart.atrium.right.

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 Intrachamber. It is commonly used with the system or sample type Heart.atrium.right.

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: US+Estimated

What it does not mean

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

Key facts

Right atrial Intrachamber pressure estimated by US
Intrachamber
Right atrial pressure (RAP) can be estimated based on the diameter and collapsibility of the inferior vena cava (IVC) during inspiration as measured by ultrasound. Smaller diameter with greater than 50% collapsibility generally indicates normal RAP, while larger diameter and less than 50% collapsibility may indicate elevated RAP. The estimated RAP can be combined with tricuspid regurgitant jet velocity measurement to estimate the systolic right ventricular pressure [LOINC82341-9]. [PMID: 20620859]
Atrial; CARD.US; Cardiac; Cardio; Cardiology; Echography; Est; estimation; Heart Disease; Hrt; Intrachamber pres; Point in time; predicted; Pressure; QNT; Quan; Quant; Quantitative; R; RA; Random; RAP; RT; Sonogram; Sonograph; Sonography; ULS; Ultrasound

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

Right atrial Intrachamber pressure estimated by USRA Intrachamber pres US+estIntrachamberCARD.USPresPtHeart.atrium.right

Frequently asked questions

Code details

Code82337-7
SystemLOINC
Display nameRight atrial Intrachamber pressure estimated by US
DescriptionIntrachamber
Short nameRA Intrachamber pres US+est
ComponentIntrachamber
PropertyPres
TimingPt
System (specimen)Heart.atrium.right
ScaleQn
MethodUS+Estimated
ClassCARD.US
Example unitsmm Hg
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.58
Last changed2.71

Part names

IntrachamberPresPtHeart.atrium.rightQnUS+EstimatedPressurePoint in time (spot)Heart.atrium RightUltrasound+Estimated

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 82337-7 | HealthAssure