LOINC

LOINC Code 4051-9: Thioridazine (S) [Mass/Vol]

4051-9 is a LOINC code used to identify Thioridazine (S) [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 Thioridazine. It is commonly used with the system or sample type Ser.

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 Thioridazine. It is commonly used with the system or sample type Ser.

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: DEPRECATED

What it does not mean

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

Key facts

  • Deprecated Thioridazine [Mass/volume] in Serum or Plasma
  • Thioridazine
  • DRUG/TOXICOLOGY; Drugs; Level; Mass concentration; Mellaril; Novo-ridazine; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; Sonapax; SR; Thioridazine Hydrochloride; Thioril

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

Thioridazine (S) [Mass/Vol]Deprecated Thioridazine [Mass/volume] in Serum or PlasmaDeprecated Thioridazine Ser-mCncThioridazineDRUG/TOXThioridazine, BloodMCnc

Frequently asked questions

Code details

Code4051-9
SystemLOINC
Display nameThioridazine (S) [Mass/Vol]
DescriptionThioridazine
Short nameDeprecated Thioridazine Ser-mCnc
ComponentThioridazine
PropertyMCnc
TimingPt
System (specimen)Ser
ScaleQn
ClassDRUG/TOX
StatusDEPRECATED

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0
Last changed2.36

Consumer names

Thioridazine, Blood

Part names

ThioridazineMCncPtSerQnMass ConcentrationPoint in time (spot)Serum

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 4051-9 | HealthAssure