LOINC Code 78872-9: OPC3373 (Metabolite of Ariprazole) (U) [Z-score]

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 OPC3373. 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: Observation

What it does not mean

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

Key facts

• OPC3373 (Metabolite of Ariprazole) [Z-score] in Urine
• OPC3373
• This term represents the Z-score for a patient's drug result. It was created for, but not limited in use to, the Ameritox Medication Monitoring system, which assesses a patient's medication compliance by comparing the patient's result to a reference database of results from chronic pain patients who were known to be adherent to their medication regimen. In order to compare to the reference database, the patient's result is first normalized based on urine creatinine and lean body mass using a proprietary algorithm, and then the normalized result is converted to a Z-score based on the reference population. If the patient's Z-score is between -2 and +2, the patient is likely to be taking the drug as prescribed. If the score is less than -2, the patient's drug level is lower than expected, which could be a sign that the patient stopped taking the drug or has altered metabolism. If the score is greater than +2, the patient's drug level is higher than expected, which could occur for a number of reasons, including overuse of the drug or impaired metabolism due to liver or kidney disease.
• Aripiprazole metabolite; DRUG/TOXICOLOGY; Drugs; Point in time; QNT; Quan; Quant; Quantitative; Random; Standard score; UA; UR; Urn; Z score; Z value; Z-score

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