LOINCActiveObservation

LOINC Code 28609-6: Alpha aminobutyrate/Creatinine (24H U) [Ratio]

28609-6 is a LOINC code used to identify Alpha aminobutyrate/Creatinine (24H U) [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 Alpha aminobutyrate/Creatinine. It is commonly used with the system or sample type Urine.

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 Alpha aminobutyrate/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

  • Alpha aminobutyrate/Creatinine [Ratio] in 24 hour Urine
  • Alpha aminobutyrate/Creatinine
  • 1 day; 24 hours; 24HR; 2-aminobutanoic acid; 2-aminobutyrate; 2-aminobutyric acid; A-Aminobutyr; AANB; A-ANB; Alfa; Alpha aminobutyric acid; Alpha amino-n-butyrate; Alpha amino-n-butyric acid; Aminobutric; Aminobutyric; Amino-n-butyrate; Chemistry; CR; Crea; Creat; QNT; Quan; Quant; Quantitative; Ratios; Rto; 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

Alpha aminobutyrate/Creatinine (24H U) [Ratio]Alpha aminobutyrate/Creatinine [Ratio] in 24 hour UrineA-Aminobutyr/Creat 24h Ur-RtoAlpha aminobutyrate/CreatinineCHEMAlpha aminobutyrate/Creatinine, UrineRatio

Frequently asked questions

Code details

Code28609-6
SystemLOINC
Display nameAlpha aminobutyrate/Creatinine (24H U) [Ratio]
DescriptionAlpha aminobutyrate/Creatinine
Short nameA-Aminobutyr/Creat 24h Ur-Rto
ComponentAlpha aminobutyrate/Creatinine
PropertyRatio
Timing24H
System (specimen)Urine
ScaleQn
ClassCHEM
Example unitsumol/g creatinine
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.00
Last changed2.70

Consumer names

Alpha aminobutyrate/Creatinine, Urine

Part names

Alpha aminobutyrate/CreatinineRatio24HUrineQn24 hours

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.