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 77913-2: Mitral valve Vena contracta diameter by US.doppler

Name: LOINC Code 77913-2: Mitral valve Vena contracta diameter by US.doppler
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:58.755Z

77913-2 is a LOINC code used to identify Mitral valve Vena contracta diameter by US.doppler 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 Vena contracta diameter. It is commonly used with the system or sample type Mitral valve.

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 Vena contracta diameter. It is commonly used with the system or sample type Mitral valve.

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.doppler

What it does not mean

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

Key facts

Mitral valve Vena contracta diameter by US.doppler
Vena contracta diameter
CARD.US; Cardio; Cardiology; DIA; Diam; DOP; DUPLEX; Echography; Heart Disease; Length; MV; Point in time; QNT; Quan; Quant; Quantitative; Random; Sonogram; Sonograph; Sonography; ULS; Ultrasound; VC diam

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

Mitral valve Vena contracta diameter by US.dopplerMV VC diam DOPVena contracta diameterCARD.USLenPtMitral valve

Frequently asked questions

Code details

Code77913-2

SystemLOINC

Display nameMitral valve Vena contracta diameter by US.doppler

DescriptionVena contracta diameter

Short nameMV VC diam DOP

ComponentVena contracta diameter

PropertyLen

TimingPt

System (specimen)Mitral valve

ScaleQn

MethodUS.doppler

ClassCARD.US

Example unitscm

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.52

Last changed2.54

Part names

Vena contracta diameterLenPtMitral valveQnUS.dopplerLengthPoint in time (spot)Ultrasound.doppler

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.