Word of the day: Melena melaena Melena refers to the black, "tarry" feces that are associated with upper gastrointestinal bleeding. The black color is caused by the hemoglobin in the blood Blood in Stool ICD 10: 2026 Guide to Prevent GI Denials Hematochezia ICD 10 CM Codes Positive Cologuard ICD 10 Coding Guide
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