B50-B64
Protozoal diseases
Block coding notes
Excludes 1 never together · Excludes 2 may co-exist
Codes in this block
72 codes
Billableusable codeNon-billableheader / grouping codeRisk-adjusting
- B50Plasmodium falciparum malariaNon-billable
- B50.0Plasmodium falciparum malaria with cerebral complicationsBillable
- B50.8Other severe and complicated Plasmodium falciparum malariaBillable
- B50.9Plasmodium falciparum malaria, unspecifiedBillable
- B51Plasmodium vivax malariaNon-billable
- B51.0Plasmodium vivax malaria with rupture of spleenBillable
- B51.8Plasmodium vivax malaria with other complicationsBillable
- B51.9Plasmodium vivax malaria without complicationBillable
- B52Plasmodium malariae malariaNon-billable
- B52.0Plasmodium malariae malaria with nephropathyBillable
- B52.8Plasmodium malariae malaria with other complicationsBillable
- B52.9Plasmodium malariae malaria without complicationBillable
- B53Other specified malariaNon-billable
- B53.0Plasmodium ovale malariaBillable
- B53.1Malaria due to simian plasmodiaBillable
- B53.8Other malaria, not elsewhere classifiedBillable
- B54Unspecified malariaBillable
- B55LeishmaniasisNon-billable
- B55.0Visceral leishmaniasisBillable
- B55.1Cutaneous leishmaniasisBillable
- B55.2Mucocutaneous leishmaniasisBillable
- B55.9Leishmaniasis, unspecifiedBillable
- B56African trypanosomiasisNon-billable
- B56.0Gambiense trypanosomiasisBillable
- B56.1Rhodesiense trypanosomiasisBillable
- B56.9African trypanosomiasis, unspecifiedBillable
- B57Chagas' diseaseNon-billable
- B57.0Acute Chagas' disease with heart involvementBillable
- B57.1Acute Chagas' disease without heart involvementBillable
- B57.2Chagas' disease (chronic) with heart involvementBillable
- B57.3Chagas' disease (chronic) with digestive system involvementNon-billable
- B57.30Chagas' disease with digestive system involvement, unspecifiedBillable
- B57.31Megaesophagus in Chagas' diseaseBillable
- B57.32Megacolon in Chagas' diseaseBillable
- B57.39Other digestive system involvement in Chagas' diseaseBillable
- B57.4Chagas' disease (chronic) with nervous system involvementNon-billable
- B57.40Chagas' disease with nervous system involvement, unspecifiedBillable
- B57.41Meningitis in Chagas' diseaseBillable
- B57.42Meningoencephalitis in Chagas' diseaseBillable
- B57.49Other nervous system involvement in Chagas' diseaseBillable
- B57.5Chagas' disease (chronic) with other organ involvementBillable
- B58ToxoplasmosisNon-billable
- B58.0Toxoplasma oculopathyNon-billable
- B58.00Toxoplasma oculopathy, unspecifiedBillable
- B58.01Toxoplasma chorioretinitisBillable
- B58.09Other toxoplasma oculopathyBillable
- B58.1Toxoplasma hepatitisBillable
- B58.2Toxoplasma meningoencephalitisBillable
- B58.3Pulmonary toxoplasmosisBillable
- B58.8Toxoplasmosis with other organ involvementNon-billable
- B58.81Toxoplasma myocarditisBillable
- B58.82Toxoplasma myositisBillable
- B58.83Toxoplasma tubulo-interstitial nephropathyBillable
- B58.89Toxoplasmosis with other organ involvementBillable
- B58.9Toxoplasmosis, unspecifiedBillable
- B59PneumocystosisBillable
- B60Other protozoal diseases, not elsewhere classifiedNon-billable
- B60.0BabesiosisNon-billable
- B60.00Babesiosis, unspecifiedBillable
- B60.01Babesiosis due to Babesia microtiBillable
- B60.02Babesiosis due to Babesia duncaniBillable
- B60.03Babesiosis due to Babesia divergensBillable
- B60.09Other babesiosisBillable
- B60.1AcanthamebiasisNon-billable
- B60.10Acanthamebiasis, unspecifiedBillable
- B60.11Meningoencephalitis due to Acanthamoeba (culbertsoni)Billable
- B60.12Conjunctivitis due to AcanthamoebaBillable
- B60.13Keratoconjunctivitis due to AcanthamoebaBillable
- B60.19Other acanthamebic diseaseBillable
- B60.2NaegleriasisBillable
- B60.8Other specified protozoal diseasesBillable
- B64Unspecified protozoal diseaseBillable
Official Guidelines for B50-B64
FY 2026 ›I.C.1Chapter-specific guidanceChapter 1: Certain Infectious and Parasitic Diseases (A00-B99), U07.1, U09.9
Subsections
- I.C.1.aHuman Immunodeficiency Virus (HIV) Infections
- I.C.1.bInfectious agents as the cause of diseases classified to other chapters
- I.C.1.cInfections resistant to antibiotics
- I.C.1.dSepsis, Severe Sepsis, and Septic Shock Infections resistant to antibiotics
- I.C.1.eMethicillin Resistant Staphylococcus aureus (MRSA) Conditions
- I.C.1.fZika virus infections
- I.C.1.gCoronavirus infections