Chapter I
Certain infectious and parasitic diseases
(A00-B99)

Protozoal diseases
(B50-B64)

Excludes: amoebiasis ( A06.- )
other protozoal intestinal diseases ( A07.- )

B50 Plasmodium falciparum malaria
Includes: mixed infections of Plasmodium falciparum with any other Plasmodium species
B50.0 Plasmodium falciparum malaria with cerebral complications
Cerebral malaria NOS
B50.8 Other severe and complicated Plasmodium falciparum malaria
Severe or complicated Plasmodium falciparum malaria NOS
B50.9 Plasmodium falciparum malaria, unspecified

B51 Plasmodium vivax malaria
Includes: mixed infections of Plasmodium vivax with other Plasmodium species, except Plasmodium falciparum
Excludes: when mixed with Plasmodium falciparum ( B50.- )
B51.0 Plasmodium vivax malaria with rupture of spleen
B51.8 Plasmodium vivax malaria with other complications
B51.9 Plasmodium vivax malaria without complication
Plasmodium vivax malaria NOS

B52 Plasmodium malariae malaria
Includes: mixed infections of Plasmodium malariae with other Plasmodium species, except Plasmodium falciparum and Plasmodium vivax
Excludes: when mixed with Plasmodium:
· falciparum ( B50.- )
· vivax ( B51.- )
B52.0 Plasmodium malariae malaria with nephropathy
B52.8 Plasmodium malariae malaria with other complications
B52.9 Plasmodium malariae malaria without complication
Plasmodium malariae malaria NOS

B53 Other parasitologically confirmed malaria
B53.0 Plasmodium ovale malaria
Excludes: when mixed with Plasmodium:
· falciparum ( B50.- )
· malariae ( B52.- )
· vivax ( B51.- )
B53.1 Malaria due to simian plasmodia
Excludes: when mixed with Plasmodium:
· falciparum ( B50.- )
· malariae ( B52.- )
· ovale ( B53.0 )
· vivax ( B51.- )
B53.8 Other parasitologically confirmed malaria, not elsewhere classified
Parasitologically confirmed malaria NOS

B54 Unspecified malaria
Clinically diagnosed malaria without parasitological confirmation

B55 Leishmaniasis
B55.0 Visceral leishmaniasis
Kala-azar
Post-kala-azar dermal leishmaniasis
B55.1 Cutaneous leishmaniasis
B55.2 Mucocutaneous leishmaniasis
B55.9 Leishmaniasis, unspecified

B56 African trypanosomiasis
B56.0 Gambiense trypanosomiasis
Infection due to Trypanosoma brucei gambiense
West African sleeping sickness
B56.1 Rhodesiense trypanosomiasis
East African sleeping sickness
Infection due to Trypanosoma brucei rhodesiense
B56.9 African trypanosomiasis, unspecified
Sleeping sickness NOS
Trypanosomiasis NOS, in places where African trypanosomiasis is prevalent

B57 Chagas' disease
Includes: American trypanosomiasis
infection due to Trypanosoma cruzi
B57.0+ Acute Chagas' disease with heart involvement ( I41.2* , I98.1* )
Acute Chagas' disease with:
· cardiovascular involvement NEC ( I98.1* )
· myocarditis ( I41.2* )
B57.1 Acute Chagas' disease without heart involvement
Acute Chagas' disease NOS
B57.2 Chagas' disease (chronic) with heart involvement
American trypanosomiasis NOS
Chagas' disease (chronic) (with):
· NOS
· cardiovascular involvement NEC+ ( I98.1* )
· myocarditis+ ( I41.2* )
Trypanosomiasis NOS, in places where Chagas' disease is prevalent
B57.3 Chagas' disease (chronic) with digestive system involvement
B57.4 Chagas' disease (chronic) with nervous system involvement
B57.5 Chagas' disease (chronic) with other organ involvement

B58 Toxoplasmosis
Includes: infection due to Toxoplasma gondii
Excludes: congenital toxoplasmosis ( P37.1 )
B58.0+ Toxoplasma oculopathy
Toxoplasma chorioretinitis ( H32.0* )
B58.1+ Toxoplasma hepatitis ( K77.0* )
B58.2+ Toxoplasma meningoencephalitis ( G05.2* )
B58.3+ Pulmonary toxoplasmosis ( J17.3* )
B58.8 Toxoplasmosis with other organ involvement
Toxoplasma:
· myocarditis+ ( I41.2* )
· myositis+ ( M63.1* )
B58.9 Toxoplasmosis, unspecified

B59+ Pneumocystosis ( J17.3* )
Pneumonia due to Pneumocystis carinii

B60 Other protozoal diseases, not elsewhere classified
Excludes: cryptosporidiosis ( A07.2 )
intestinal microsporidiosis ( A07.8 )
isosporiasis ( A07.3 )
B60.0 Babesiosis
Piroplasmosis
B60.1 Acanthamoebiasis
Conjunctivitis due to Acanthamoeba+ ( H13.1* )
Keratoconjunctivitis due to Acanthamoeba+ ( H19.2* )
B60.2 Naegleriasis
Primary amoebic meningoencephalitis+ ( G05.2* )
B60.8 Other specified protozoal diseases
Microsporidiosis

B64 Unspecified protozoal disease