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.

LOINCActiveBoth

LOINC Code 16644-7: Codeine Free Confirm Ql

Name: LOINC Code 16644-7: Codeine Free Confirm Ql
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:26.379Z

16644-7 is a LOINC code used to identify Codeine Free Confirm Ql 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 Codeine.free. 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 Codeine.free. 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: Both
Method: Confirm

What it does not mean

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

Key facts

Codeine Free [Presence] in Serum or Plasma by Confirmatory method
Codeine.free
c260; C300; Cfm; CNFR; CNFRM; Codeine Free; Conf; Confirmation; Confirmatory; DRUG/TOXICOLOGY; Drugs; FR; GCMS; LC/MS/MS; Methylmorphine; Morphine methyl ether; Non-protein bound; Ordinal; Pl; Plasma; Plsm; Point in time; PR; QL; Qual; Qualitative; Random; Screen; 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

Codeine Free Confirm QlCodeine Free [Presence] in Serum or Plasma by Confirmatory methodCodeine Free SerPl Ql CfmCodeine.freeDRUG/TOXFree codeine, BloodPrThr

Frequently asked questions

Code details

Code16644-7

SystemLOINC

Display nameCodeine Free Confirm Ql

DescriptionCodeine.free

Short nameCodeine Free SerPl Ql Cfm

ComponentCodeine.free

PropertyPrThr

TimingPt

System (specimen)Ser/Plas

ScaleOrd

MethodConfirm

ClassDRUG/TOX

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0l

Last changed2.73

Consumer names

Free codeine, Blood

Part names

Codeine.freePrThrPtSer/PlasOrdConfirmCodeine FreePresence or ThresholdPoint 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.