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.

LOINCActiveBoth

LOINC Code 81122-4: HIV 1 RNA reverse transcriptase and protease gene sequence Nom (S/P/Bld)

Name: LOINC Code 81122-4: HIV 1 RNA reverse transcriptase and protease gene sequence Nom (S/P/Bld)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:03.794Z

81122-4 is a LOINC code used to identify HIV 1 RNA reverse transcriptase and protease gene sequence Nom (S/P/Bld) 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 1 RNA reverse transcriptase & protease gene. It is commonly used with the system or sample type Ser/Plas/Bld.

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 1 RNA reverse transcriptase & protease gene. It is commonly used with the system or sample type Ser/Plas/Bld.

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: Both
Method: Sequencing

What it does not mean

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

Key facts

HIV 1 RNA reverse transcriptase and protease gene [Nucleotide sequence] in Serum, Plasma or Blood by Sequencing
HIV 1 RNA reverse transcriptase & protease gene
This term is used to report the nucleotide sequence of the HIV-1 reverse transcriptase and protease genes based on viral RNA. The specific regions that are sequenced and reporting format may vary by laboratory and local reporting requirements. This term was created for, but is not limited in use to, the submitter's ViroSeq HIV-1 Genotyping System, which includes generation of a 1.3 kb consensus sequence based on sequencing of the entire protease and two-thirds of the reverse transcriptase genes.
AIDS; ANTIBIOTIC SUSCEPTIBILITIES; Blood; high-throughput sequencing; HIV 1 RNA RT + PR; HIV type 1; HIV type I; HIV1; HIV1 RNA RT+PR gene; HTS; Human immunodeficiency virus; i; ID; Infectious Disease; InfectiousDisease; Next generation sequencing; NGS; Nominal; Pl; PlasBld; Plasma; Plsm; Point in time; PR; Random; REV; Ribonucleic acid; RT; SerP; SerPl; SerPlas; SerPlBld; Serum; Serum or plasma; Serum, plasma or whole blood; SR; WB; Whole blood

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 1 RNA reverse transcriptase and protease gene sequence Nom (S/P/Bld)HIV 1 RNA reverse transcriptase and protease gene [Nucleotide sequence] in Serum, Plasma or Blood by SequencingHIV 1 RNA RT + PR Seq SerPlBldHIV 1 RNA reverse transcriptase & protease geneABXBACTHIV 1 RNA Reverse Transcriptase and Protease gene, BloodSeq

Frequently asked questions

Code details

Code81122-4

SystemLOINC

Display nameHIV 1 RNA reverse transcriptase and protease gene sequence Nom (S/P/Bld)

DescriptionHIV 1 RNA reverse transcriptase & protease gene

Short nameHIV 1 RNA RT + PR Seq SerPlBld

ComponentHIV 1 RNA reverse transcriptase & protease gene

PropertySeq

TimingPt

System (specimen)Ser/Plas/Bld

ScaleNom

MethodSequencing

ClassABXBACT

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.56

Last changed2.65

Consumer names

HIV 1 RNA Reverse Transcriptase and Protease gene, Blood

Part names

HIV 1 RNA reverse transcriptase & protease geneSeqPtSer/Plas/BldNomSequencingHIV 1 RNA reverse transcriptase and protease geneNucleotide sequencePoint in time (spot)Serum, Plasma or Blood

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.