LOINC Code 74434-2: Bilirubin Infrared spectroscopy (Stone) [Mass fraction]

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 Bilirubin/Total. It is commonly used with the system or sample type Calculus.

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: Infrared spectroscopy

What it does not mean

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

Key facts

• Bilirubin.total/Total in Stone by Infrared spectroscopy
• Bilirubin/Total
• Evaluation of bilirubin in gallstones by infared spectroscopy (IRS) is performed to determine the type of gallstone (e.g. cholesterol tone, mixed stone, or pigment stone) and for diagnostic purposes.
• Bili; Bilirubins; Billirubin; Calc; Calculi; Chemistry; Infared spectoscopy; IR; Mass fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Stn; Stone; Stones; TBIL; Tot; Totl

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