Neurosyphilis, unspecified

This code represents a form of syphilis that has invaded the central nervous system, but without further specification of the particular manifestation (e.g., meningovascular, general paresis, tabes dorsalis). It indicates a confirmed diagnosis of neurosyphilis where the specific neurological syndrome is not documented or is unknown.

Use this code when the medical record clearly states a diagnosis of neurosyphilis, but does not provide details on the specific type or presentation. Documentation supporting this code would include positive serological tests for syphilis in cerebrospinal fluid (CSF), or clinical signs and symptoms consistent with neurosyphilis without a more precise diagnosis.

• Avoid using this code if a more specific type of neurosyphilis (e.g., A52.10-A52.19) is documented; always code to the highest level of specificity.
• Ensure documentation supports CNS involvement, not just latent or tertiary syphilis without neurological signs.
• Consider sequencing this code as a primary diagnosis if it is the reason for the encounter, or as a secondary diagnosis if it is a co-morbidity.