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LOINC Code 102041-1: Carboxy tetrahydrocannabinol Delta 9/Creatinine (U) [Mass ratio]

102041-1 is a LOINC code used to identify Carboxy tetrahydrocannabinol Delta 9/Creatinine (U) [Mass ratio] 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 Carboxy tetrahydrocannabinol Delta 9/Creatinine. 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 Carboxy tetrahydrocannabinol Delta 9/Creatinine. 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

What it does not mean

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

Key facts

Carboxy tetrahydrocannabinol Delta 9/Creatinine [Mass Ratio] in Urine
Carboxy tetrahydrocannabinol Delta 9/Creatinine
Carboxy THC is the major metabolite of cannabinoid found in urine, but is not related to source, time of exposure, amount, or impairment. Carboxy THC may be found in urine for 7-10 days following light or moderate use and as long as 4-6 weeks following heavy use. THC metabolites are stored rapidly in body fat following use and are released slowly over time. [https//www.ncbi.nlm.nih.gov/pmc/articles/PMC3196989/]
11-nor-9-carboxy-delta-9-THC; 11-nor-9-carboxy-THC; 11-nor-delta-9-THC-9-COOH; 9-carboxy-11-nor-delta-9-tetrahydrocannabinol; 9-Carboxy-delta(9)-thc; 9-Carboxy-thc; C22H30O4; Carboxytetrahydrocannabinol; CarboxyTHC; Carboxy-THC-delta-9; CR; Crea; Creat; delta(9)-Tetrahydrocannabinolic acid; Delta(9)-THC; Delta-9-tetrahydrocannabinol; Delta-9-tetrahydrocannabinol metabolite; Dronabinol; DRUG/TOXICOLOGY; Drugs; Marijuana; Mass concentration ratio; Mass ratio; MCRto; Nabilone; Point in time; QNT; Quan; Quant; Quantitative; Random; THC; THC-9-COOH; THC-9-COOH/Cr; THCA; THCA-A; THCC; THCCOOH; THC-COOH; UA; UCr; 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

Carboxy tetrahydrocannabinol Delta 9/Creatinine (U) [Mass ratio]Carboxy tetrahydrocannabinol Delta 9/Creatinine [Mass Ratio] in UrineTHC-9-COOH/Creat UrCarboxy tetrahydrocannabinol Delta 9/CreatinineDRUG/TOXCarboxy tetrahydrocannabinol Delta 9/Creatinine, UrineMRto

Frequently asked questions

Code details

Code102041-1
SystemLOINC
Display nameCarboxy tetrahydrocannabinol Delta 9/Creatinine (U) [Mass ratio]
DescriptionCarboxy tetrahydrocannabinol Delta 9/Creatinine
Short nameTHC-9-COOH/Creat Ur
ComponentCarboxy tetrahydrocannabinol Delta 9/Creatinine
PropertyMRto
TimingPt
System (specimen)Urine
ScaleQn
ClassDRUG/TOX
Example unitsug/L
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.75
Last changed2.76

Consumer names

Carboxy tetrahydrocannabinol Delta 9/Creatinine, Urine

Part names

Carboxy tetrahydrocannabinol Delta 9/CreatinineMRtoPtUrineQnMass RatioPoint in time (spot)

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.