Dark stool vs black stool the difference can be serious. Dark brown stool is often food or iron related. Black, tarry stool may indicate internal bleeding and needs urgent medical attention. Don't Ignore If Your Stool Color Changes Suddenly Comment POOP and I'll send you the stool guide I use with my patients. Trust your gut. Follow @doctor.sethi for no BS gut science Natural or Biologic Chromoendoscopy for Detection of Colorectal Polyps EndoCollab Solved] ICD 10 CM and PCS codes. A 75 year old male was admitted to the hospital after coming to the emergency department Course Hero