Unspecified protozoal disease (B64) ICD-10-CM
The B64 code range covers unspecified protozoal disease with 1 ICD-10-CM diagnosis codes. 1 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the B64 Range 1 codes · 1 billable
- B64 Unspecified protozoal disease
About the B64 Code Range
The ICD-10 code B64 is used to identify an unspecified protozoal disease, which covers infections caused by protozoa that are not classified under more specific codes. This code applies when a protozoal infection is confirmed but the exact type or site is unclear.
Unspecified protozoal disease (B64) encompasses a range of parasitic infections, including conditions such as protozoal conjunctivitis, protozoal myocarditis leading to dilated cardiomyopathy, protozoal esophagitis, myositis, and encephalitis caused by protozoa. These infections can affect multiple body systems—skin, eyes, heart, nervous system, and more—and sometimes complicate pregnancy or childbirth. The use of synonyms like parasitic conjunctivitis, protozoan infection, and infectious ulcer of the esophagus helps medical coders recognize related conditions when the exact protozoal cause is not specified, ensuring correct assignment of this ICD-10 code. Understanding when to apply B64 is essential for accurately coding protozoal infestations with unclear or unspecified presentations, especially when documentation lacks precise detail on the protozoan species or primary affected site.
Questions About This Page
How many billable codes are in the B64 range?
Of the 1 codes in this range, 1 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the B64 range classify?
The range classifies unspecified protozoal disease. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
