Diagnosaurus
- Dandruff
- Dark urine
- Deafness
- Death, sudden
- Decubitus ulcers
- Delirium
- Dementia
- Depigmentation
- Depression
- Dermatitis, exfoliative
- Dermatitis, seborrheic
- Dermatology, general DDx
- Desquamative erythema
- Diarrhea, acute
- Diarrhea, chronic
- Diarrhea, malabsorption
- Diarrhea, traveler's
- Diarrhea in diabetes
- Diarrhea in HIV/AIDS
- Diastolic murmur
- Diffusion capacity decreased on PFTs
- Diffusion capacity increased on PFTs
- Dilated pupil
- Diplopia
- Dizziness
- DLCO decreased on PFTs
- DLCO increased on PFTs
- Double vision
- Drowning
- Dry eyes
- Dry mouth
- Dysarthria
- Dysequilibrium
- Dysfunctional uterine bleeding
- Dysmenorrhea
- Dyspareunia
- Dyspepsia
- Dysphagia
- Dyspnea
- Dyspnea, episodic
- Dyspnea, nocturnal
- Dystonia
- Dysuria