LOINCActiveBoth

LOINC Code 104628-3: Methadone Gas chromatography-mass spectrometry (U) [Mass/Vol]

104628-3 is a LOINC code used to identify Methadone Gas chromatography-mass spectrometry (U) [Mass/Vol] 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 Methadone. 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 Methadone. 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: Both
  • Method: GC-MS

What it does not mean

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

Key facts

  • Methadone [Mass/volume] in Urine by Gas chromatography-mass spectrometry
  • Methadone
  • Addiction; Dolophin; Dolophine; DRUG/TOXICOLOGY; Drugs; Drugs of abuse; Gas chromatography; Illicit; Level; Mass concentration; METD; Methadose; MTD; Point in time; PotentialForAbuse; QNT; Quan; Quant; Quantitative; Random; 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

Methadone Gas chromatography-mass spectrometry (U) [Mass/Vol]Methadone [Mass/volume] in Urine by Gas chromatography-mass spectrometryMethadone Ur GC-MS-mCncMethadoneDRUG/TOXMethadone, UrineMCnc

Frequently asked questions

Code details

Code104628-3
SystemLOINC
Display nameMethadone Gas chromatography-mass spectrometry (U) [Mass/Vol]
DescriptionMethadone
Short nameMethadone Ur GC-MS-mCnc
ComponentMethadone
PropertyMCnc
TimingPt
System (specimen)Urine
ScaleQn
MethodGC-MS
ClassDRUG/TOX
Example unitsng/mL
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.78
Last changed2.78

Consumer names

Methadone, Urine

Part names

MethadoneMCncPtUrineQnGC-MSMass ConcentrationPoint in time (spot)Gas chromatography-mass spectrometry

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 104628-3 | HealthAssure