LOINCActiveObservation

LOINC Code 49303-1: Amino acid pattern Nar (CSF) [Interp]

49303-1 is a LOINC code used to identify Amino acid pattern Nar (CSF) [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 Amino acid pattern. It is commonly used with the system or sample type CSF.

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 Amino acid pattern. It is commonly used with the system or sample type CSF.

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

  • Amino acid pattern [Interpretation] in Cerebral spinal fluid Narrative
  • Amino acid pattern
  • Acd; Acids; Cerebral spinal fluid; Cerebrospinal Fl; Chemistry; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Narrative; Point in time; Random; Report; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid

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

Amino acid pattern Nar (CSF) [Interp]Amino acid pattern [Interpretation] in Cerebral spinal fluid NarrativeAmino acid Pat CSF-ImpAmino acid patternCHEMInterpretation of Amino acid pattern test result, Spinal fluidImp

Frequently asked questions

Code details

Code49303-1
SystemLOINC
Display nameAmino acid pattern Nar (CSF) [Interp]
DescriptionAmino acid pattern
Short nameAmino acid Pat CSF-Imp
ComponentAmino acid pattern
PropertyImp
TimingPt
System (specimen)CSF
ScaleNar
ClassCHEM
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.21
Last changed2.73

Consumer names

Interpretation of Amino acid pattern test result, Spinal fluid

Part names

Amino acid patternImpPtCSFNarImpression/interpretation of studyPoint in time (spot)Cerebral spinal fluid

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.

LOINC Code 49303-1 | HealthAssure