LOINC Code 81421-0: Baker's yeast IgG IA Ql (S)

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 Saccharomyces cerevisiae Ab.IgG. It is commonly used with the system or sample type Ser.

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

• Baker's yeast IgG Ab [Presence] in Serum by Immunoassay
• Saccharomyces cerevisiae Ab.IgG
• Saccharomyces cerevisiae antibodies (ASCA) testing is used to distinguish between Crohn's disease (CD) and ulcerative colitis (UC), the two most common types of inflammatory bowel disease (IBD). Testing usually includes detecting two different classes of ASCA in the blood, IgG and IgA, as well as other antibodies, including anti-neutrophil cytoplasmic antibodies (ANCA). ASCA are more common in patients with CD, while ANCA are more common in those with UC.
• ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; ASCA; Autoantibodies; Autoantibody; Bakers yeast; Baker's yeast; Crohn disease; EIA; ELFA; ELISA; Enzyme immunoassay; f045; f403; f45; IAA; Immune globulin G; Immunoglobulin G; MEIA; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; SCA; Screen; Serum; SR; SUDS; Yeast

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