| A5132 | Syphilitic alopecia |
| A5139 | Other secondary syphilis of skin |
| A514 | Other secondary syphilis |
| A5141 | Secondary syphilitic meningitis |
| A5142 | Secondary syphilitic female pelvic disease |
| A5143 | Secondary syphilitic oculopathy |
| A5144 | Secondary syphilitic nephritis |
| A5145 | Secondary syphilitic hepatitis |
| A5146 | Secondary syphilitic osteopathy |
| A5149 | Other secondary syphilitic conditions |
| A515 | Early syphilis, latent |
| A519 | Early syphilis, unspecified |
| A52 | Late syphilis |
| A520 | Cardiovascular and cerebrovascular syphilis |
| A5200 | Cardiovascular syphilis, unspecified |
| A5201 | Syphilitic aneurysm of aorta |
| A5202 | Syphilitic aortitis |
| A5203 | Syphilitic endocarditis |
| A5204 | Syphilitic cerebral arteritis |
| A5205 | Other cerebrovascular syphilis |
| A5206 | Other syphilitic heart involvement |
| A5209 | Other cardiovascular syphilis |
| A521 | Symptomatic neurosyphilis |
| A5210 | Symptomatic neurosyphilis, unspecified |
| A5211 | Tabes dorsalis |
| A5212 | Other cerebrospinal syphilis |
| A5213 | Late syphilitic meningitis |
| A5214 | Late syphilitic encephalitis |
| A5215 | Late syphilitic neuropathy |
| A5216 | Charcot's arthropathy (tabetic) |
| A5217 | General paresis |
| A5219 | Other symptomatic neurosyphilis |
| A522 | Asymptomatic neurosyphilis |
| A523 | Neurosyphilis, unspecified |
| A527 | Other symptomatic late syphilis |
| A5271 | Late syphilitic oculopathy |
| A5272 | Syphilis of lung and bronchus |
| A5273 | Symptomatic late syphilis of other respiratory organs |
| A5274 | Syphilis of liver and other viscera |
| A5275 | Syphilis of kidney and ureter |
| A5276 | Other genitourinary symptomatic late syphilis |
| A5277 | Syphilis of bone and joint |
| A5278 | Syphilis of other musculoskeletal tissue |
| A5279 | Other symptomatic late syphilis |
| A528 | Late syphilis, latent |
| A529 | Late syphilis, unspecified |
| A53 | Other and unspecified syphilis |
| A530 | Latent syphilis, unspecified as early or late |
| A539 | Syphilis, unspecified |
| A54 | Gonococcal infection |