• IBD - See Crohn's Disease

• Ichthyosis

• Idiopathic Pulmonary Fibrosis - See Pulmonary Fibrosis

• Idiopathic Thrombocytopenic Purpura

• Idiopathic Thrombocytopenic Purpura (ITP)

• IgA Nephropathy

See also: Glomerulonephritis

• Immunodeficiency Disorders

• Immunosuppression - See Immunodeficiency Disorders

• Impetigo

• Impotence - See Erectile Dysfunction

• Infectious Esophagitis

• Infectious Mononucleosis - See Mononucleosis

• Infertility

• Inflammatory Bowel Disease - See Crohn's Disease

• Influenza

• Ingrown Toenail

• Insomnia

• Interstitial Cystitis

• Interstitial Nephritis

• Intervertebral Disk Disease - See Prolapsed Intervertebral Disk

• Intestinal Ischemia

• Intestinal Malrotation

• Intestinal Obstruction

• Intestinal Pseudo-Obstruction

• Intra-abdominal Abscess

• Intussusception

• Iron Deficiency Anemia

• Irritable Bowel Syndrome

• Ischemic Colitis

• Itching

• ITP - See Idiopathic Thrombocytopenic Purpura (ITP)