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.

LOINCActiveOrder

LOINC Code 49661-2: HIV protease gene mutations Phenotype method (Isol)

Name: LOINC Code 49661-2: HIV protease gene mutations Phenotype method (Isol)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:33.942Z

49661-2 is a LOINC code used to identify HIV protease gene mutations Phenotype method (Isol) 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 HIV protease gene mutations. 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 HIV protease gene mutations. 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: Order
Panel type: Panel
Method: Phenotyping

What it does not mean

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

Key facts

HIV protease gene mutations by Phenotype method
HIV protease gene mutations
AIDS; ANTIBIOTIC SUSCEPTIBILITIES; HIV PI gene; HIV PI gene mut; Human immunodeficiency virus; Islt; Isol; Mut; Mutation; Muts; Pan; Panel; PANEL.ANTIBIOTIC SUSCEPTIBILITIES; Panl; Pheno; Phenotype; Phenotypic; PI; Pnl; Point in time; PR; Random

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

HIV protease gene mutations Phenotype method (Isol)HIV protease gene mutations by Phenotype methodHIV PI gene mut Islt PhenotypHIV protease gene mutationsPANEL.ABXBACT-Pt

Frequently asked questions

Code details

Code49661-2

SystemLOINC

Display nameHIV protease gene mutations Phenotype method (Isol)

DescriptionHIV protease gene mutations

Short nameHIV PI gene mut Islt Phenotyp

ComponentHIV protease gene mutations

Property-

TimingPt

System (specimen)Isolate

Scale-

MethodPhenotyping

ClassPANEL.ABXBACT

StatusACTIVE

Order/ObservationOrder

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.79

Consumer names

HIV protease gene mutations

Part names

HIV protease gene mutations-PtIsolatePhenotypingPoint 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.