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 3336-5: Amitriptyline trough >12 Hr post dose [Mass/Vol]

Name: LOINC Code 3336-5: Amitriptyline trough >12 Hr post dose [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:20.068Z

3336-5 is a LOINC code used to identify Amitriptyline trough >12 Hr post dose [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 Amitriptyline^trough >12h post dose. It is commonly used with the system or sample type Ser/Plas.

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 Amitriptyline^trough >12h post dose. It is commonly used with the system or sample type Ser/Plas.

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

Amitriptyline [Mass/volume] in Serum or Plasma --trough >12 hours post dose
Amitriptyline^trough >12h post dose
>12h Trough; After; Amit; Amitrip; Amitriptylene; Amitriptyln; DRUG/TOXICOLOGY; Drugs; Elatrol; Elavil; Endep; Level; Mass concentration; p dose; Pl; Plasma; Plsm; Point in time; Pre; Predose; Pre-dose; PST; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Trepiline; Tryptanol; Tryptizol

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

Amitriptyline trough >12 Hr post dose [Mass/Vol]Amitriptyline [Mass/volume] in Serum or Plasma --trough >12 hours post doseAmitrip >12h Trough SerPl-mCncAmitriptyline^trough >12h post doseDRUG/TOXAmitriptyline trough >12 hr after dose, BloodMCnc

Frequently asked questions

Code details

Code3336-5

SystemLOINC

Display nameAmitriptyline trough >12 Hr post dose [Mass/Vol]

DescriptionAmitriptyline^trough >12h post dose

Short nameAmitrip >12h Trough SerPl-mCnc

ComponentAmitriptyline^trough >12h post dose

PropertyMCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassDRUG/TOX

Example unitsng/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.40

Consumer names

Amitriptyline trough >12 hr after dose, Blood

Part names

Amitriptyline^trough >12h post doseMCncPtSer/PlasQnMass ConcentrationPoint in time (spot)Serum or Plasma

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.