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 5664-8: Heavy metals negative Screen Nom (U)

Name: LOINC Code 5664-8: Heavy metals negative Screen Nom (U)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:38.263Z

5664-8 is a LOINC code used to identify Heavy metals negative Screen Nom (U) 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 Heavy metals negative. It is commonly used with the system or sample type Urine.

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 Heavy metals negative. 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
Method: Screen

What it does not mean

The code identifies the observation or test, not the actual result.

Key facts

Heavy metals negative [Identifier] in Urine by Screen method
Heavy metals negative
DRUG/TOXICOLOGY; Drugs; Heavy met; Identity or presence; Metal; NEG; Nominal; Point in time; Random; Scn; Scr; Scrn; UA; 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

Heavy metals negative Screen Nom (U)Heavy metals negative [Identifier] in Urine by Screen methodHeavy Metals Neg Ur ScnHeavy metals negativeDRUG/TOXHeavy metals negative, UrinePrid

Frequently asked questions

Code details

Code5664-8

SystemLOINC

Display nameHeavy metals negative Screen Nom (U)

DescriptionHeavy metals negative

Short nameHeavy Metals Neg Ur Scn

ComponentHeavy metals negative

PropertyPrid

TimingPt

System (specimen)Urine

ScaleNom

MethodScreen

ClassDRUG/TOX

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.19

Consumer names

Heavy metals negative, Urine

Part names

Heavy metals negativePridPtUrineNomScreenPresence or IdentityPoint in time (spot)Toxicology screen

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.