Protozoal diseases
72 codes in this section
About Section B50-B64
Section B50-B64 (B50-B64) covers protozoal diseases. It sits within the Certain infectious and parasitic diseases chapter (A00-B99). This section contains 72 ICD-10-CM codes, 57 billable diagnoses you can submit on a claim, and 15 non-billable header codes used to organize the hierarchy.
Codes are organized below by 3-character root. Click the root to see all subcodes underneath it, or click any individual code for full coverage data, payer policies, and linked CPT procedures.
Codes in B50-B64
Grouped by 3-character root code. Click any code for full detail.
| B50.0 | Plasmodium falciparum malaria with cerebral complications | Billable |
| B50.8 | Other severe and complicated Plasmodium falciparum malaria | Billable |
| B50.9 | Plasmodium falciparum malaria, unspecified | Billable |
| B51.0 | Plasmodium vivax malaria with rupture of spleen | Billable |
| B51.8 | Plasmodium vivax malaria with other complications | Billable |
| B51.9 | Plasmodium vivax malaria without complication | Billable |
| B52.0 | Plasmodium malariae malaria with nephropathy | Billable |
| B52.8 | Plasmodium malariae malaria with other complications | Billable |
| B52.9 | Plasmodium malariae malaria without complication | Billable |
| B53.0 | Plasmodium ovale malaria | Billable |
| B53.1 | Malaria due to simian plasmodia | Billable |
| B53.8 | Other malaria, not elsewhere classified | Billable |
| B55.0 | Visceral leishmaniasis | Billable |
| B55.1 | Cutaneous leishmaniasis | Billable |
| B55.2 | Mucocutaneous leishmaniasis | Billable |
| B55.9 | Leishmaniasis, unspecified | Billable |
| B56.0 | Gambiense trypanosomiasis | Billable |
| B56.1 | Rhodesiense trypanosomiasis | Billable |
| B56.9 | African trypanosomiasis, unspecified | Billable |
| B57.0 | Acute Chagas' disease with heart involvement | Billable |
| B57.1 | Acute Chagas' disease without heart involvement | Billable |
| B57.2 | Chagas' disease (chronic) with heart involvement | Billable |
| B57.3 | Chagas' disease (chronic) with digestive system involvement | Header |
| B57.30 | Chagas' disease with digestive system involvement, unspecified | Billable |
| B57.31 | Megaesophagus in Chagas' disease | Billable |
| B57.32 | Megacolon in Chagas' disease | Billable |
| B57.39 | Other digestive system involvement in Chagas' disease | Billable |
| B57.4 | Chagas' disease (chronic) with nervous system involvement | Header |
| B57.40 | Chagas' disease with nervous system involvement, unspecified | Billable |
| B57.41 | Meningitis in Chagas' disease | Billable |
| B57.42 | Meningoencephalitis in Chagas' disease | Billable |
| B57.49 | Other nervous system involvement in Chagas' disease | Billable |
| B57.5 | Chagas' disease (chronic) with other organ involvement | Billable |
| B58.0 | Toxoplasma oculopathy | Header |
| B58.00 | Toxoplasma oculopathy, unspecified | Billable |
| B58.01 | Toxoplasma chorioretinitis | Billable |
| B58.09 | Other toxoplasma oculopathy | Billable |
| B58.1 | Toxoplasma hepatitis | Billable |
| B58.2 | Toxoplasma meningoencephalitis | Billable |
| B58.3 | Pulmonary toxoplasmosis | Billable |
| B58.8 | Toxoplasmosis with other organ involvement | Header |
| B58.81 | Toxoplasma myocarditis | Billable |
| B58.82 | Toxoplasma myositis | Billable |
| B58.83 | Toxoplasma tubulo-interstitial nephropathy | Billable |
| B58.89 | Toxoplasmosis with other organ involvement | Billable |
| B58.9 | Toxoplasmosis, unspecified | Billable |
| B60.0 | Babesiosis | Header |
| B60.00 | Babesiosis, unspecified | Billable |
| B60.01 | Babesiosis due to Babesia microti | Billable |
| B60.02 | Babesiosis due to Babesia duncani | Billable |
| B60.03 | Babesiosis due to Babesia divergens | Billable |
| B60.09 | Other babesiosis | Billable |
| B60.1 | Acanthamebiasis | Header |
| B60.10 | Acanthamebiasis, unspecified | Billable |
| B60.11 | Meningoencephalitis due to Acanthamoeba (culbertsoni) | Billable |
| B60.12 | Conjunctivitis due to Acanthamoeba | Billable |
| B60.13 | Keratoconjunctivitis due to Acanthamoeba | Billable |
| B60.19 | Other acanthamebic disease | Billable |
| B60.2 | Naegleriasis | Billable |
| B60.8 | Other specified protozoal diseases | Billable |
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
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