LOINCActiveObservation

LOINC Code 17996-0: Aortic valve Maximum cusp separation [Length] by US

17996-0 is a LOINC code used to identify Aortic valve Maximum cusp separation [Length] 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 Cusp separation.max. It is commonly used with the system or sample type Aortic 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 Cusp separation.max. It is commonly used with the system or sample type Aortic 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

What it does not mean

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

Key facts

  • Aortic valve Maximum cusp separation [Length] by US
  • Cusp separation.max
  • ACS; AO; AoV; AV; CARD.US; Cardio; Cardiology; Cusp sep.max; Echography; Heart Disease; Largest; Length; Maximal; Maximum; Peak; Point in time; QNT; Quan; Quant; Quantitative; Random; 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

Aortic valve Maximum cusp separation [Length] by USAV Cusp sep.max USCusp separation.maxCARD.USLenPtAortic valve

Frequently asked questions

Code details

Code17996-0
SystemLOINC
Display nameAortic valve Maximum cusp separation [Length] by US
DescriptionCusp separation.max
Short nameAV Cusp sep.max US
ComponentCusp separation.max
PropertyLen
TimingPt
System (specimen)Aortic valve
ScaleQn
MethodUS
ClassCARD.US
Example unitsmm
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Part names

Cusp separation.maxLenPtAortic valveQnUSLengthPoint 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.

LOINC Code 17996-0 | HealthAssure