| secondary syphilitic meningitis | A51.41 |
| secondary syphilitic hepatitis | A51.45 |
| secondary syphilitic female pelvic disease | A51.42 |
| sealpox | B08.62 |
| schistosomiasis, unspecified | B65.9 |
| schistosomiasis due to schistosoma mansoni [intestinal schistosomiasis] | B65.1 |
| schistosomiasis due to schistosoma japonicum | B65.2 |
| schistosomiasis due to schistosoma haematobium [urinary schistosomiasis] | B65.0 |
| schistosomiasis [bilharziasis] | B65 |
| scarlet fever, uncomplicated | A38.9 |
| scarlet fever with otitis media | A38.0 |
| scarlet fever with other complications | A38.8 |
| scarlet fever with myocarditis | A38.1 |
| scarlet fever | A38 |
| scabies | B86 |
| scabies | B86 |
| sars-associated coronavirus as the cause of diseases classified elsewhere | B97.21 |
| sandfly fever | A93.1 |
| salmonella with other localized infection | A02.29 |
| salmonella sepsis | A02.1 |
| salmonella pyelonephritis | A02.25 |
| salmonella pneumonia | A02.22 |
| salmonella osteomyelitis | A02.24 |
| salmonella meningitis | A02.21 |
| salmonella infection, unspecified | A02.9 |
| salmonella enteritis | A02.0 |
| salmonella arthritis | A02.23 |
| salmon poisoning | A79.89.1 |
| rubella without complication | B06.9 |
| rubella with neurological complication, unspecified | B06.00 |
| rubella pneumonia | B06.81 |
| rubella meningitis | B06.02 |
| rubella encephalitis | B06.01 |
| rubella arthritis | B06.82 |
| rubella [german measles] | B06 |
| rotaviral enteritis | A08.0 |
| ross river disease | B33.1 |
| rocio virus disease | A83.6 |
| rift valley fever | A92.4 |
| rickettsiosis, unspecified | A79.9 |
| rickettsiosis due to ehrlichia sennetsu | A79.81 |
| rickettsioses | A75 -A79 |
| rickettsialpox due to rickettsia akari | A79.1 |
| rhodesiense trypanosomiasis | B56.1 |
| rhinosporidiosis | B48.1 |
| rhinocerebral mucormycosis | B46.1 |
| retrovirus infections, not elsewhere classified | B33.3 |
| retroperitoneal tuberculosis | A18.39 |
| respiratory tuberculosis unspecified | A15.9 |
| respiratory tuberculosis | A15 |
| respiratory syncytial virus as the cause of diseases classified elsewhere | B97.4 |
| respiratory capillariasis | B88.9.2 |
| reovirus as the cause of diseases classified elsewhere | B97.5 |
| relapsing fevers | A68 |
| relapsing fever, unspecified | A68.9 |
| recrudescent typhus [brill's disease] | A75.1 |
| rat-bite fevers | A25 |
| rat-bite fever, unspecified | A25.9 |
| rabies, unspecified | A82.9 |
| rabies | A82 |
| q fever | A78 |
| q fever | A78 |
| pythiosis | 16.14.6.1 |
| pulmonary tularemia | A21.2 |
| pulmonary toxoplasmosis | B58.3 |
| pulmonary sporotrichosis | B42.0 |
| pulmonary paracoccidioidomycosis | B41.0 |
| pulmonary nocardiosis | A43.0 |
| pulmonary mycobacterial infection | A31.0 |
| pulmonary mucormycosis | B46.0 |
| pulmonary histoplasmosis capsulati, unspecified | B39.2 |
| pulmonary cryptococcosis | B45.0 |
| pulmonary coccidioidomycosis, unspecified | B38.2 |
| pulmonary candidiasis | B37.1 |
| pulmonary blastomycosis, unspecified | B40.2 |
| pulmonary anthrax | A22.1 |
| pulmonary actinomycosis | A42.0 |
| pseudorabies | B00.89.1 |
| pseudomonas (aeruginosa) (mallei) (pseudomallei) as the cause of diseases classified elsewhere | B96.5 |
| pseudocowpox [milker's node] | B08.03 |
| protozoal intestinal disease, unspecified | A07.9 |
| protozoal diseases | B50 -B64 |
| proteus (mirabilis) (morganii) as the cause of diseases classified elsewhere | B96.4 |
| prostatic coccidioidomycosis | B38.81 |
| progressive multifocal leukoencephalopathy | A81.2 |
| primary syphilis of other sites | A51.2 |
| primary respiratory tuberculosis | A15.7 |
| primary lesions of pinta | A67.0 |
| primary genital syphilis | A51.0 |
| primary anal syphilis | A51.1 |
| postmeningococcal arthritis | A39.84 |
| postherpetic trigeminal neuralgia | B02.22 |
| postherpetic polyneuropathy | B02.23 |
| postherpetic myelitis | B02.24 |
| postherpetic geniculate ganglionitis | B02.21 |
| pneumonic plague | A20.2 |
| pneumocystosis | B59 |
| pneumocystosis | B59 |
| plasmodium vivax malaria without complication | B51.9 |
| plasmodium vivax malaria with rupture of spleen | B51.0 |