- deep venous thrombosis
- delirium
- delusional infestation
- dementia
- dental hygiene
- depression
- depressive symptoms
- developmental delay
- diabetes
- diabetes mellitus
- diabetic cardiomyopathy
- diabetic nephropathy
- diabetic neuropathy
- diarrheal diseases
- diffuse large b cell lymphoma
- digestive diseases
- diphtheria
- disability
- disordered eating
- diverticular disease
- diverticulitis
- diverticulosis
- down syndrome
- down's syndrome
- dry eye disease
- duchenne muscular dystrophy
- ductal carcinoma
- dyslexia
