| A4902 | Methicillin resistant Staphylococcus aureus infection, unspecified site |
| A491 | Streptococcal infection, unspecified site |
| A492 | Hemophilus influenzae infection, unspecified site |
| A493 | Mycoplasma infection, unspecified site |
| A498 | Other bacterial infections of unspecified site |
| A499 | Bacterial infection, unspecified |
| A50 | Congenital syphilis |
| A500 | Early congenital syphilis, symptomatic |
| A5001 | Early congenital syphilitic oculopathy |
| A5002 | Early congenital syphilitic osteochondropathy |
| A5003 | Early congenital syphilitic pharyngitis |
| A5004 | Early congenital syphilitic pneumonia |
| A5005 | Early congenital syphilitic rhinitis |
| A5006 | Early cutaneous congenital syphilis |
| A5007 | Early mucocutaneous congenital syphilis |
| A5008 | Early visceral congenital syphilis |
| A5009 | Other early congenital syphilis, symptomatic |
| A501 | Early congenital syphilis, latent |
| A502 | Early congenital syphilis, unspecified |
| A503 | Late congenital syphilitic oculopathy |
| A5030 | Late congenital syphilitic oculopathy, unspecified |
| A5031 | Late congenital syphilitic interstitial keratitis |
| A5032 | Late congenital syphilitic chorioretinitis |
| A5039 | Other late congenital syphilitic oculopathy |
| A504 | Late congenital neurosyphilis [juvenile neurosyphilis] |
| A5040 | Late congenital neurosyphilis, unspecified |
| A5041 | Late congenital syphilitic meningitis |
| A5042 | Late congenital syphilitic encephalitis |
| A5043 | Late congenital syphilitic polyneuropathy |
| A5044 | Late congenital syphilitic optic nerve atrophy |
| A5045 | Juvenile general paresis |
| A5049 | Other late congenital neurosyphilis |
| A505 | Other late congenital syphilis, symptomatic |
| A5051 | Clutton's joints |
| A5052 | Hutchinson's teeth |
| A5053 | Hutchinson's triad |
| A5054 | Late congenital cardiovascular syphilis |
| A5055 | Late congenital syphilitic arthropathy |
| A5056 | Late congenital syphilitic osteochondropathy |
| A5057 | Syphilitic saddle nose |
| A5059 | Other late congenital syphilis, symptomatic |
| A506 | Late congenital syphilis, latent |
| A507 | Late congenital syphilis, unspecified |
| A509 | Congenital syphilis, unspecified |
| A51 | Early syphilis |
| A510 | Primary genital syphilis |
| A511 | Primary anal syphilis |
| A512 | Primary syphilis of other sites |
| A513 | Secondary syphilis of skin and mucous membranes |
| A5131 | Condyloma latum |