LOINC Code 90845-9: PCA-Tr Ab IF 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 Purkinje cell cytoplasmic type Tr 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: IF

What it does not mean

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

Key facts

• PCA-Tr Ab [Presence] in Cerebral spinal fluid by Immunofluorescence
• Purkinje cell cytoplasmic type Tr Ab
• ABS; Aby; ACIF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; Cytopl; Cytoplas; FA; Fluorescent antibody; Fluoresent; Hodgkin's lymphoma; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Limbic encephalopathy; Neuro; Neurology; Ordinal; Paraneoplastic cerebellar degeneration; Paraneoplastic neurological syndrome; Paraneoplastic syndrome; PCD; PNS; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Serology; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Time Resolved Fluorescence; TRF

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