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 57965-6: Fosamprenavir+Ritonavir Phenotype method [Susc]

Name: LOINC Code 57965-6: Fosamprenavir+Ritonavir Phenotype method [Susc]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:38.758Z

57965-6 is a LOINC code used to identify Fosamprenavir+Ritonavir Phenotype method [Susc] 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 Fosamprenavir+Ritonavir. It is commonly used with the system or sample type Isolate.

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 Fosamprenavir+Ritonavir. It is commonly used with the system or sample type Isolate.

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: Phenotyping

What it does not mean

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

Key facts

Fosamprenavir+Ritonavir [Susceptibility] by Phenotype method
Fosamprenavir+Ritonavir
908; ANTIBIOTIC SUSCEPTIBILITIES; AST; FPV; GW433908; ID; Infectious Disease; InfectiousDisease; Islt; Isol; Lexiva; Norvir; Pheno; Phenotype; Phenotypic; Point in time; Random; RTV; Sus; Suscept; Susceptibilities; Susceptibility; Susceptibilty; Telzir; Virtual Phenotype

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

Fosamprenavir+Ritonavir Phenotype method [Susc]Fosamprenavir+Ritonavir [Susceptibility] by Phenotype methodFosamprenavir+Ritonavir Islt PhenotypFosamprenavir+RitonavirABXBACTSusceptibility to Fosamprenavir+RitonavirSusc

Frequently asked questions

Code details

Code57965-6

SystemLOINC

Display nameFosamprenavir+Ritonavir Phenotype method [Susc]

DescriptionFosamprenavir+Ritonavir

Short nameFosamprenavir+Ritonavir Islt Phenotyp

ComponentFosamprenavir+Ritonavir

PropertySusc

TimingPt

System (specimen)Isolate

ScaleOrdQn

MethodPhenotyping

ClassABXBACT

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.29

Last changed2.73

Consumer names

Susceptibility to Fosamprenavir+Ritonavir

Part names

Fosamprenavir+RitonavirSuscPtIsolateOrdQnPhenotypingSusceptibility (microorganisms)Point in time (spot)Viral phenotype susceptibility

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.