ICD-10-CM > A00-B99 > A50-A64 > A51 > A51.4 A51.4 Other secondary syphilis Non-Billable/Non-Specific Codes A51.41Secondary syphilitic meningitisA51.42Secondary syphilitic female pelvic diseaseA51.43Secondary syphilitic oculopathyA51.44Secondary syphilitic nephritisA51.45Secondary syphilitic hepatitisA51.46Secondary syphilitic osteopathyA51.49Other secondary syphilitic conditions