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 55896-5: Hypoxanthine phosphoribosyltransferase (CVS) [Catalytic activity/Mass]

Name: LOINC Code 55896-5: Hypoxanthine phosphoribosyltransferase (CVS) [Catalytic activity/Mass]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

55896-5 is a LOINC code used to identify Hypoxanthine phosphoribosyltransferase (CVS) [Catalytic activity/Mass] 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 Hypoxanthine phosphoribosyltransferase. It is commonly used with the system or sample type CVS.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Hypoxanthine phosphoribosyltransferase. It is commonly used with the system or sample type CVS.

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

What it does not mean

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

Key facts

Hypoxanthine phosphoribosyltransferase [Enzymatic activity/mass] in Chorionic villus sample
Hypoxanthine phosphoribosyltransferase
Catalytic Content; Chemistry; Chorionic villi; Chorionic villus sample; HGPRT; HPRT; hypoxanthine-guanine phosphoribosyltransferase; Point in time; QNT; Quan; Quant; Quantitative; 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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Hypoxanthine phosphoribosyltransferase (CVS) [Catalytic activity/Mass] (55896-5)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Hypoxanthine phosphoribosyltransferase (CVS) [Catalytic activity/Mass]Hypoxanthine phosphoribosyltransferase [Enzymatic activity/mass] in Chorionic villus sampleHPRT CVS-cCntHypoxanthine phosphoribosyltransferaseCHEMHypoxanthine phosphoribosyltransferase, Chorionic villus specimenCCnt

Frequently asked questions

Code details

Code55896-5

SystemLOINC

Display nameHypoxanthine phosphoribosyltransferase (CVS) [Catalytic activity/Mass]

DescriptionHypoxanthine phosphoribosyltransferase

Short nameHPRT CVS-cCnt

ComponentHypoxanthine phosphoribosyltransferase

PropertyCCnt

TimingPt

System (specimen)CVS

ScaleQn

ClassCHEM

Example unitsnmol/min/mg protein

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.29

Last changed2.42

Consumer names

Hypoxanthine phosphoribosyltransferase, Chorionic villus specimen

Part names

Hypoxanthine phosphoribosyltransferaseCCntPtCVSQnCatalytic ContentPoint in time (spot)Chorionic villus sample

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.