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 79619-3: S-beta aminoisobutyrate/Creatinine (U) [Molar ratio]

Name: LOINC Code 79619-3: S-beta aminoisobutyrate/Creatinine (U) [Molar ratio]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:01.837Z

79619-3 is a LOINC code used to identify S-beta aminoisobutyrate/Creatinine (U) [Molar ratio] 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 S-beta aminoisobutyrate/Creatinine. It is commonly used with the system or sample type Urine.

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 S-beta aminoisobutyrate/Creatinine. It is commonly used with the system or sample type Urine.

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

S-beta aminoisobutyrate/Creatinine [Molar ratio] in Urine
S-beta aminoisobutyrate/Creatinine
3-aminoisobutyrate; 3-aminoisobutyric acid; B; B-AIB; Chemistry; CR; Crea; Creat; Esoteric; Point in time; QNT; Quan; Quant; Quantitative; Random; S prime; S-B-AIB; Scrto; Substance concentration ratio; Substance ratio; UA; UCr; UR; Urn

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

S-beta aminoisobutyrate/Creatinine (U) [Molar ratio]S-beta aminoisobutyrate/Creatinine [Molar ratio] in UrineS-B-AIB/Creat Ur-sRtoS-beta aminoisobutyrate/CreatinineCHEMS-beta aminoisobutyrate/Creatinine, UrineSRto

Frequently asked questions

Code details

Code79619-3

SystemLOINC

Display nameS-beta aminoisobutyrate/Creatinine (U) [Molar ratio]

DescriptionS-beta aminoisobutyrate/Creatinine

Short nameS-B-AIB/Creat Ur-sRto

ComponentS-beta aminoisobutyrate/Creatinine

PropertySRto

TimingPt

System (specimen)Urine

ScaleQn

ClassCHEM

Example unitsumol/mmol creatinine

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.54

Last changed2.56

Consumer names

S-beta aminoisobutyrate/Creatinine, Urine

Part names

S-beta aminoisobutyrate/CreatinineSRtoPtUrineQnSubstance RatioPoint in time (spot)

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.