LOINCActiveObservation

LOINC Code 13500-4: Amino acid pattern [Interp]

13500-4 is a LOINC code used to identify Amino acid pattern [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 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 Amino acid 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

  • Amino acid pattern [Interpretation] in Serum or Plasma
  • Amino acid pattern
  • Acd; Acids; Chemistry; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Nominal; Pl; Plasma; Plsm; Point in time; Random; 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

Amino acid pattern [Interp]Amino acid pattern [Interpretation] in Serum or PlasmaAmino acid Pat SerPl-ImpAmino acid patternCHEMAmino acid pattern, BloodImp

Frequently asked questions

Code details

Code13500-4
SystemLOINC
Display nameAmino acid pattern [Interp]
DescriptionAmino acid pattern
Short nameAmino acid Pat SerPl-Imp
ComponentAmino acid pattern
PropertyImp
TimingPt
System (specimen)Ser/Plas
ScaleNom
ClassCHEM
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0j-a
Last changed2.73

Consumer names

Amino acid pattern, Blood

Part names

Amino acid patternImpPtSer/PlasNomImpression/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.

LOINC Code 13500-4 | HealthAssure