| mumps pancreatitis | B26.3 |
| mumps polyneuropathy | B26.84 |
| mumps without complication | B26.9 |
| mycetoma | B47 |
| mycetoma, unspecified | B47.9 |
| mycobacterial infection, unspecified | A31.9 |
| mycoplasma infection, unspecified site | A49.3 |
| mycoplasma pneumoniae [m pneumoniae] as the cause of diseases classified elsewhere | B96.0 |
| mycoses | B35 -B49 |
| myiasis | B87 |
| myiasis of other sites | B87.89 |
| myiasis, unspecified | B87.9 |
| myositis in cysticercosis | B69.81 |
| naegleriasis | B60.2 |
| nasal capillariasis | B88.9.1 |
| nasopharyngeal diphtheria | A36.1 |
| nasopharyngeal myiasis | B87.3 |
| necatoriasis | B76.1 |
| necrotizing ulcerative stomatitis | A69.0 |
| neosporosis | 17.11.8.1 |
| neurosyphilis, unspecified | A52.3 |
| nocardiosis | A43 |
| nocardiosis, unspecified | A43.9 |
| nonpneumonic legionnaires' disease [pontiac fever] | A48.2 |
| nonvenereal syphilis | A65 |
| nonvenereal syphilis | A65 |
| obstetrical tetanus | A34 |
| obstetrical tetanus | A34 |
| ocular myiasis | B87.2 |
| oculoglandular listeriosis | A32.81 |
| oculoglandular tularemia | A21.1 |
| omsk hemorrhagic fever | A98.1 |
| onchocerciasis | B73 |
| onchocerciasis with endophthalmitis | B73.01 |
| onchocerciasis with eye involvement, unspecified | B73.00 |
| onchocerciasis with glaucoma | B73.02 |
| onchocerciasis with other eye involvement | B73.09 |
| onchocerciasis without eye disease | B73.1 |
| oncovirus as the cause of diseases classified elsewhere | B97.32 |
| o'nyong-nyong fever | A92.1 |
| opisthorchiasis | B66.0 |
| orf virus disease | B08.02 |
| oropouche virus disease | A93.0 |
| osseous cryptococcosis | B45.3 |
| other acanthamebic disease | B60.19 |
| other acariasis | B88.0 |
| other acute paralytic poliomyelitis | A80.39 |
| other acute viral hepatitis | B17 |
| other acute viral hepatitis with hepatic coma | B17.11 |
| other acute viral hepatitiswithout hepatic coma | B17.10 |
| other amebic genitourinary infections | A06.82 |
| other amebic infections | A06.89 |
| other and unspecified infectious diseases | B99 |
| other and unspecified syphilis | A53 |
| other arenaviral hemorrhagic fevers | A96.8 |
| other arthropod infestations | B88.2 |
| other arthropod-borne viral fevers, not elsewhere classified | A93 |
| other atypical virus infections of central nervous system | A81.89 |
| other bacterial agents as the cause of diseases classified elsewhere | B96 |
| other bacterial diseases | A30 -A49 |
| other bacterial diseases, not elsewhere classified | A48 |
| other bacterial foodborne intoxications, not elsewhere classified | A05 |
| other bacterial infections of unspecified site | A49.8 |
| other bacterial intestinal infections | A04 |
| other brucellosis | A23.8 |
| other cardiovascular syphilis | A52.09 |
| other cerebrospinal syphilis | A52.12 |
| other cerebrovascular syphilis | A52.05 |
| other cestode infections | B71 |
| other chlamydial diseases | A74.89 |
| other chlamydial genitourinary infection | A56.19 |
| other chlamydial infection of lower genitourinary tract | A56.09 |
| other chronic viral hepatitis | B18.8 |
| other conditions associated with lyme disease | A69.29 |
| other coronavirus as the cause of diseases classified elsewhere | B97.29 |
| other creutzfeldt-jakob disease | A81.09 |
| other cytomegaloviral diseases | B25.8 |
| other dermatophytoses | B35.8 |
| other digestive system involvement in chagas' disease | B57.39 |
| other diphtheritic complications | A36.89 |
| other diseases caused by chlamydiae | A70 -A74 |
| other diseases caused by chlamydiae | A74 |
| other early congenital syphilis, symptomatic | A50.09 |
| other early skin lesions of yaws | A66.2 |
| other echinococcosis | B67.99 |
| other ehrlichiosis | A77.49 |
| other enterovirus as the cause of diseases classified elsewhere | B97.19 |
| other escherichia coli [e coli] as the cause of diseases classified elsewhere | B96.29 |
| other filariases | B74.8 |
| other fluke infections | B66 |
| other forms of actinomycosis | A42.89 |
| other forms of anthrax | A22.8 |
| other forms of aspergillosis | B44.89 |
| other forms of bartonellosis | A44.8 |
| other forms of blastomycosis | B40.89 |
| other forms of chromomycosis | B43.8 |
| other forms of coccidioidomycosis | B38.89 |
| other forms of cryptococcosis | B45.8 |
| other forms of erysipeloid | A26.8 |
| other forms of leprosy | A30.8 |