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 87770-4: Topiramate/Creatinine Confirm (U) [Mass ratio]

Name: LOINC Code 87770-4: Topiramate/Creatinine Confirm (U) [Mass ratio]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:16.696Z

87770-4 is a LOINC code used to identify Topiramate/Creatinine Confirm (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 Topiramate/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 Topiramate/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
Method: Confirm

What it does not mean

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

Key facts

Topiramate/Creatinine [Mass Ratio] in Urine by Confirmatory method
Topiramate/Creatinine
Atracurium besylate; C12H21NO8S; Cfm; CNFR; CNFRM; Conf; Confirmation; Confirmatory; CR; Crea; Creat; DRUG/TOXICOLOGY; Drugs; GCMS; LC/MS/MS; Lennox-Gastaut syndrome; Mass concentration ratio; Mass ratio; MCRto; Point in time; QNT; Quan; Quant; Quantitative; Qudexy XR; Random; Topamax; Toprimate; Tracrium; Trokendi XR; 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

Topiramate/Creatinine Confirm (U) [Mass ratio]Topiramate/Creatinine [Mass Ratio] in Urine by Confirmatory methodTopiramate/Creat Ur CfmTopiramate/CreatinineDRUG/TOXTopiramate/Creatinine, UrineMRto

Frequently asked questions

Code details

Code87770-4

SystemLOINC

Display nameTopiramate/Creatinine Confirm (U) [Mass ratio]

DescriptionTopiramate/Creatinine

Short nameTopiramate/Creat Ur Cfm

ComponentTopiramate/Creatinine

PropertyMRto

TimingPt

System (specimen)Urine

ScaleQn

MethodConfirm

ClassDRUG/TOX

Example unitsng/mg creatinine

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.63

Last changed2.73

Consumer names

Topiramate/Creatinine, Urine

Part names

Topiramate/CreatinineMRtoPtUrineQnConfirmMass 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.