Abnormal immunological findings in cerebrospinal fluid

This code signifies the presence of unusual or pathological immune system markers detected in a sample of cerebrospinal fluid (CSF). These findings often indicate an inflammatory, infectious, or autoimmune process affecting the central nervous system. It reflects laboratory results that deviate from normal immunological parameters in CSF.

Apply this code when laboratory reports confirm abnormal levels of immunoglobulins, oligoclonal bands, or other immune-related proteins in CSF. This is typically seen in conditions like multiple sclerosis, CNS infections (e.g., viral meningitis), or autoimmune encephalopathies. Documentation must explicitly state "abnormal immunological findings" or specify the particular abnormal immune markers in the CSF.

• Do not use this code if the CSF findings are normal or if the abnormality is non-immunological (e.g., elevated protein without immune markers).
• Always code the underlying definitive diagnosis (e.g., multiple sclerosis, meningitis) first, if known. This code is for the finding, not the disease itself.
• Ensure the documentation clearly specifies the immunological nature of the CSF abnormality to differentiate from other abnormal CSF findings.