Diarrhea ICD-10-CM is commonly coded as R19.7 – Diarrhea, unspecified, when a patient has diarrhea but the medical record does not identify a more specific underlying cause. Diarrhea refers to frequent or loose/watery bowel movements and may occur due to infection, medication, dietary factors, gastrointestinal conditions, or other causes. The appropriate ICD-10-CM code should be selec... https://revantagebilling.com/diarrhea-icd-10-coding-guide-for-providers/