LOINC Code 50689-9: T. pallidum Ab HA Ql (CSF)

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 Treponema pallidum Ab. It is commonly used with the system or sample type CSF.

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: HA

What it does not mean

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

Key facts

• Treponema pallidum Ab [Presence] in Cerebral spinal fluid by Hemagglutination
• Treponema pallidum Ab
• ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; HATTS; Hemagglutination; ID; IHA; Infectious Disease; InfectiousDisease; MHA-TP; Microbiology; Neuro; Neurology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Syphilis; T palldm; T pallidum; TPHA; Treponemal

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