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 79291-1: Creatine and guanidinoacetate pattern Nar [Interp]

Name: LOINC Code 79291-1: Creatine and guanidinoacetate pattern Nar [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:00.209Z

79291-1 is a LOINC code used to identify Creatine and guanidinoacetate pattern Nar [Interp] 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 Creatine & guanidinoacetate pattern. It is commonly used with the system or sample type Ser/Plas.

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 Creatine & guanidinoacetate pattern. It is commonly used with the system or sample type Ser/Plas.

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

Creatine and guanidinoacetate pattern [Interpretation] in Serum or Plasma Narrative

Creatine & guanidinoacetate pattern

Increased guanidinoacetate (GAA) is a marker for the diagnosis of guanidinoacetate methyltransferase (GAMT) deficiency. Almeidaa et al (2004) found the GAA levels in plasma to be 4-22 times higher in patients with GAMT deficiency compared to controls.[PMID15234334]

Chemistry; Cr and GAA pattern; GAA; glycocyamine; guanidinoacetic acid; guanidoacetic acid; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Narrative; Pl; Plasma; Plsm; Point in time; Random; Report; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR

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

Creatine and guanidinoacetate pattern Nar [Interp]Creatine and guanidinoacetate pattern [Interpretation] in Serum or Plasma NarrativeCr and GAA pattern SerPl-ImpCreatine & guanidinoacetate patternCHEMInterpretation of Creatine and Guanidinoacetate pattern test result, BloodImp

Frequently asked questions

Code details

Code79291-1

SystemLOINC

Display nameCreatine and guanidinoacetate pattern Nar [Interp]

DescriptionCreatine & guanidinoacetate pattern

Short nameCr and GAA pattern SerPl-Imp

ComponentCreatine & guanidinoacetate pattern

PropertyImp

TimingPt

System (specimen)Ser/Plas

ScaleNar

ClassCHEM

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.54

Last changed2.54

Consumer names

Interpretation of Creatine and Guanidinoacetate pattern test result, Blood

Part names

Creatine & guanidinoacetate patternImpPtSer/PlasNarCreatine and guanidinoacetate patternImpression/interpretation of studyPoint in time (spot)Serum or Plasma

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.