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 45021-3: Metanephrine and Normetanephrine [Interp]

Name: LOINC Code 45021-3: Metanephrine and Normetanephrine [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:30.175Z

45021-3 is a LOINC code used to identify Metanephrine and Normetanephrine [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 Metanephrine & Normetanephrine. 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 Metanephrine & Normetanephrine. 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

Metanephrine and Normetanephrine [Interpretation] in Serum or Plasma
Metanephrine & Normetanephrine
Chemistry; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Metaneph; Metaneph+Normetaneph; Metanephrine fractionated; Metanephrne; Metenephrine; Nominal; Normeta; Normetaneph; Normetanephrn; 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

Metanephrine and Normetanephrine [Interp]Metanephrine and Normetanephrine [Interpretation] in Serum or PlasmaMetaneph+Normetaneph SerPl-ImpMetanephrine & NormetanephrineCHEMMetanephrine and Normetanephrine, BloodImp

Frequently asked questions

Code details

Code45021-3

SystemLOINC

Display nameMetanephrine and Normetanephrine [Interp]

DescriptionMetanephrine & Normetanephrine

Short nameMetaneph+Normetaneph SerPl-Imp

ComponentMetanephrine & Normetanephrine

PropertyImp

TimingPt

System (specimen)Ser/Plas

ScaleNom

ClassCHEM

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.17

Last changed2.73

Consumer names

Metanephrine and Normetanephrine, Blood

Part names

Metanephrine & NormetanephrineImpPtSer/PlasNomMetanephrine and NormetanephrineImpression/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.