LOINC Code 99409-5: Acetaminophen-cysteine adduct LC/MS/MS [Moles/Vol]

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 Acetaminophen-cysteine adduct. 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
• Method: LC/MS/MS

What it does not mean

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

Key facts

• Acetaminophen-cysteine adduct [Moles/volume] in Serum or Plasma by LC/MS/MS
• Acetaminophen-cysteine adduct
• 3-(cystein-S-yl)-acetaminophen; ACET; Acetamidophenol; Acetaminoph; Acetaminophen-cysteine conjugate; Acetominophen; APAP; APAP-CYS; APAP-Cysteine; c209; C55; Cys; DRUG/TOXICOLOGY; Drugs; Hepatotoxicity; Hydroxyacetanilide; Level; N-(4-Hydroxyphenyl)acetanilide; N-Acetyl-p-aminophenol; N-acetyl-p-benzoquinone imine (NAPQI); p-Acetamidophenol; Paracetamol; p-Hydroxyacetanilide; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Substance concentration; Tylenol; u209

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

Frequently asked questions