Coccidiosis

This code represents coccidiosis, an intestinal parasitic infection caused by protozoa of the genus Coccidia. In humans, it typically manifests as gastroenteritis with symptoms such as watery diarrhea, abdominal pain, and fever. While often self-limiting in immunocompetent individuals, it can cause severe and prolonged illness in immunocompromised patients.

Use this code when documentation confirms a diagnosis of coccidiosis based on microscopic identification of oocysts in stool samples or other diagnostic tests. This code is appropriate for both acute and chronic presentations of the infection. Supporting documentation should clearly indicate the causative agent as Coccidia.

• Do not confuse this with other parasitic enteritis codes; ensure the documentation specifically names Coccidia.
• If the patient is immunocompromised, consider an additional code for the underlying immunocompromised state (e.g., HIV, malignancy) to fully capture the patient's clinical picture.
• Sequence this code as the primary diagnosis when coccidiosis is the reason for the encounter.