| A52.0 | Cardiovascular and cerebrovascular syphilis | NON-BILLABLE CODE |
| A52.00 | Cardiovascular syphilis, unspecified | BILLABLE CODE |
| A52.01 | Syphilitic aneurysm of aorta | BILLABLE CODE |
| A52.02 | Syphilitic aortitis | BILLABLE CODE |
| A52.03 | Syphilitic endocarditis | BILLABLE CODE |
| A52.04 | Syphilitic cerebral arteritis | BILLABLE CODE |
| A52.05 | Other cerebrovascular syphilis | BILLABLE CODE |
| A52.06 | Other syphilitic heart involvement | BILLABLE CODE |
| A52.09 | Other cardiovascular syphilis | BILLABLE CODE |
| A52.1 | Symptomatic neurosyphilis | NON-BILLABLE CODE |
| A52.10 | Symptomatic neurosyphilis, unspecified | BILLABLE CODE |
| A52.11 | Tabes dorsalis | BILLABLE CODE |
| A52.12 | Other cerebrospinal syphilis | BILLABLE CODE |
| A52.13 | Late syphilitic meningitis | BILLABLE CODE |
| A52.14 | Late syphilitic encephalitis | BILLABLE CODE |
| A52.15 | Late syphilitic neuropathy | BILLABLE CODE |
| A52.16 | Charcot's arthropathy (tabetic) | BILLABLE CODE |
| A52.17 | General paresis | BILLABLE CODE |
| A52.19 | Other symptomatic neurosyphilis | BILLABLE CODE |
| A52.2 | Asymptomatic neurosyphilis | BILLABLE CODE |
| A52.3 | Neurosyphilis, unspecified | BILLABLE CODE |
| A52.7 | Other symptomatic late syphilis | NON-BILLABLE CODE |
| A52.71 | Late syphilitic oculopathy | BILLABLE CODE |
| A52.72 | Syphilis of lung and bronchus | BILLABLE CODE |
| A52.73 | Symptomatic late syphilis of other respiratory organs | BILLABLE CODE |
| A52.74 | Syphilis of liver and other viscera | BILLABLE CODE |
| A52.75 | Syphilis of kidney and ureter | BILLABLE CODE |
| A52.76 | Other genitourinary symptomatic late syphilis | BILLABLE CODE |
| A52.77 | Syphilis of bone and joint | BILLABLE CODE |
| A52.78 | Syphilis of other musculoskeletal tissue | BILLABLE CODE |
| A52.79 | Other symptomatic late syphilis | BILLABLE CODE |
| A52.8 | Late syphilis, latent | BILLABLE CODE |
| A52.9 | Late syphilis, unspecified | BILLABLE CODE |
