LOINCActiveBoth

LOINC Code 32660-3: 6-Thioguanine (RBC) [Entitic substance]

32660-3 is a LOINC code used to identify 6-Thioguanine (RBC) [Entitic substance] 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 6-Thioguanine. It is commonly used with the system or sample type RBC.

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 6-Thioguanine. It is commonly used with the system or sample type RBC.

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

  • 6-Thioguanine [Entitic substance] in Red Blood Cells
  • 6-Thioguanine
  • 6-TG; 6-TGN; DRUG/TOXICOLOGY; Drugs; Entitic substance; Erythrocytes; Lanvis; Point in time; QNT; Quan; Quant; Quantitative; Random; Red blood cells; Red blood corpusles; TGN

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

6-Thioguanine (RBC) [Entitic substance]6-Thioguanine [Entitic substance] in Red Blood Cells6-TGN EntSub RBC6-ThioguanineDRUG/TOX6-Thioguanine, Red blood cellsEntSub

Frequently asked questions

Code details

Code32660-3
SystemLOINC
Display name6-Thioguanine (RBC) [Entitic substance]
Description6-Thioguanine
Short name6-TGN EntSub RBC
Component6-Thioguanine
PropertyEntSub
TimingPt
System (specimen)RBC
ScaleQn
ClassDRUG/TOX
Example unitspmol/8x10*8 RBC
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.09
Last changed2.73

Consumer names

6-Thioguanine, Red blood cells

Part names

6-ThioguanineEntSubPtRBCQnEntitic substancePoint in time (spot)Red Blood Cells

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.