LOINC Code 72321-3: HLA-DP+DQ+DR (class II) 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 HLA-DP+DQ+DR 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

• HLA-DP+DQ+DR (class II) IgG Ab [Presence] in Serum by Immunoassay
• HLA-DP+DQ+DR Ab.IgG
• IgG antibodies to HLA Class II (HLA-DP+DQ+DR) glycoproteins are detected in patient's serum or plasma by EIA methods. Results are based on a threshold; significantly greater (e.g. 2X) absorbency compared to the negative control is considered positive. This code is based on, but not exclusive to, Lifecodes B-Screen assay.
• ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; EIA; ELFA; ELISA; Enzyme immunoassay; HLA ANTIGEN; HLA class II; Human Leukocyte Antigen; IAA; Immune globulin G; Immunoglobulin G; MEIA; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Serum; SR; SUDS

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