LOINC Code 55446-9: Cardiolipin IgG (S)
55446-9 is a LOINC code used to identify Cardiolipin IgG (S) in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Cardiolipin Ab.IgG. It is commonly used with the system or sample type Ser.
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 Cardiolipin 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: DEPRECATED
- Order vs observation: Order
What it does not mean
- The code identifies the observation or test, not the actual result.
Key facts
- Deprecated Cardiolipin IgG Ab in Serum
- Cardiolipin Ab.IgG
- Created ONLY for ORDERING in response to request from Canada Health Infoway- a national standardization effort. The dashes in this case mean that the ordering provider does not care what property or scale is used in the observation performed in response to this order. LOINC is still pondering details about how this kind of item should be represented. So the representation might change in the future, but the term will still have the same usage and meaning.
- ABS; Aby; ACA; aCL; Antby; Anti; Antibodies; Antibody; Anticardiolipin; Autoantibodies; Autoantibody; Cardio; Cardiolip; Cardiolipn; Cardiolpn; CL; Hematology; Heme; Immune globulin G; Immunoglobulin G; Lab orders; LimitedUseLabOrders; Point in time; Random; Serum; SR
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
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.