What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 78199-7: Cardiovascular system.central US Study diagnosis

Name: LOINC Code 78199-7: Cardiovascular system.central US Study diagnosis
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:58.755Z

78199-7 is a LOINC code used to identify Cardiovascular system.central US Study diagnosis 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 Study diagnosis. It is commonly used with the system or sample type Cardiovascular system.central.

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 Study diagnosis. It is commonly used with the system or sample type Cardiovascular system.central.

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

What it does not mean

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

Key facts

Cardiovascular system.central US Study diagnosis
Study diagnosis
CARD.US; Cardio; Cardiology; Cent CVS; CVS; Dx; Echography; Heart Disease; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Narrative; Point in time; Random; Report; Sonogram; Sonograph; Sonography; Study dx; Study report; 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

Cardiovascular system.central US Study diagnosisCent CVS US Study dxStudy diagnosisCARD.USImpPtCardiovascular system.central

Frequently asked questions

Code details

Code78199-7

SystemLOINC

Display nameCardiovascular system.central US Study diagnosis

DescriptionStudy diagnosis

Short nameCent CVS US Study dx

ComponentStudy diagnosis

PropertyImp

TimingPt

System (specimen)Cardiovascular system.central

ScaleNar

MethodUS

ClassCARD.US

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.54

Last changed2.54

Part names

Study diagnosisImpPtCardiovascular system.centralNarUSImpression/interpretation of studyPoint in time (spot)Ultrasound

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.