LOINC Code 83084-4: Cancer Ag 19-9 IA Qn

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 Cancer Ag 19-9. 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: IA

What it does not mean

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

Key facts

• Cancer Ag 19-9 [Units/volume] in Serum or Plasma by Immunoassay
• Cancer Ag 19-9
• This term was created for, but is not limited in use to, bioMerieux's VIDAS CA 19-9 assay, which is intended for the quantitative measurement of the 1116- NS-19-9 reactive antigenic determinants in human serum or plasma.
• Arbitrary concentration; CA; CA 19-9; Cancer Ag19-9; Cancer antigen 19-9; Carbohydrate antigen; Carbohydrate antigen 19-9; Chemistry; EIA; ELFA; ELISA; Enzyme immunoassay; IAA; MEIA; Oncology; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; SUDS; Tumor marker

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