| A692 | Lyme disease |
| A6920 | Lyme disease, unspecified |
| A6921 | Meningitis due to Lyme disease |
| A6922 | Other neurologic disorders in Lyme disease |
| A6923 | Arthritis due to Lyme disease |
| A6929 | Other conditions associated with Lyme disease |
| A698 | Other specified spirochetal infections |
| A699 | Spirochetal infection, unspecified |
| A70 | Chlamydia psittaci infections |
| A71 | Trachoma |
| A710 | Initial stage of trachoma |
| A711 | Active stage of trachoma |
| A719 | Trachoma, unspecified |
| A74 | Other diseases caused by chlamydiae |
| A740 | Chlamydial conjunctivitis |
| A748 | Other chlamydial diseases |
| A7481 | Chlamydial peritonitis |
| A7489 | Other chlamydial diseases |
| A749 | Chlamydial infection, unspecified |
| A75 | Typhus fever |
| A750 | Epidemic louse-borne typhus fever due to Rickettsia prowazekii |
| A751 | Recrudescent typhus [Brill's disease] |
| A752 | Typhus fever due to Rickettsia typhi |
| A753 | Typhus fever due to Rickettsia tsutsugamushi |
| A759 | Typhus fever, unspecified |
| A77 | Spotted fever [tick-borne rickettsioses] |
| A770 | Spotted fever due to Rickettsia rickettsii |
| A771 | Spotted fever due to Rickettsia conorii |
| A772 | Spotted fever due to Rickettsia siberica |
| A773 | Spotted fever due to Rickettsia australis |
| A774 | Ehrlichiosis |
| A7740 | Ehrlichiosis, unspecified |
| A7741 | Ehrlichiosis chaffeensis [E. chaffeensis] |
| A7749 | Other ehrlichiosis |
| A778 | Other spotted fevers |
| A779 | Spotted fever, unspecified |
| A78 | Q fever |
| A79 | Other rickettsioses |
| A790 | Trench fever |
| A791 | Rickettsialpox due to Rickettsia akari |
| A798 | Other specified rickettsioses |
| A7981 | Rickettsiosis due to Ehrlichia sennetsu |
| A7982 | Anaplasmosis [A. phagocytophilum] |
| A7989 | Other specified rickettsioses |
| A799 | Rickettsiosis, unspecified |
| A80 | Acute poliomyelitis |
| A800 | Acute paralytic poliomyelitis, vaccine-associated |
| A801 | Acute paralytic poliomyelitis, wild virus, imported |
| A802 | Acute paralytic poliomyelitis, wild virus, indigenous |
| A803 | Acute paralytic poliomyelitis, other and unspecified |