ICD-10-CM > A00-B99 > B00-B09 > B02 > B02.2 B02.2 Zoster with other nervous system involvement Non-Billable/Non-Specific Codes B02.21Postherpetic geniculate ganglionitisB02.22Postherpetic trigeminal neuralgiaB02.23Postherpetic polyneuropathyB02.24Postherpetic myelitisB02.29Other postherpetic nervous system involvement