See Conditions by First Letter (D)
- Dacryocystitis
- Dancing Eyes-dancing Feet Syndrome
- Darier Disease
- Deaf-Blind Disorders
- Deafness
- Death
- Death, Sudden
- Death, Sudden, Cardiac
- Decompression Sickness
- Deficiency Diseases
- Deglutition Disorders
- Dehydration
- Delayed Graft Function
- Delirium
- Delirium, Dementia, Amnestic, Cognitive Disorders
- Delusions
- Dementia
- Dementia, Multi-Infarct
- Dementia, Vascular
- Demyelinating Autoimmune Diseases, CNS
- Demyelinating Diseases
- Dendritic Cell, Monocyte, B Lymphocyte, and Natural Killer Lymphocyte Deficie...
- Dengue
- Dengue Fever
- Dengue Hemorrhagic Fever
- Dent Disease
- Dental Calculus
- Dental Caries
- Dental Occlusion, Traumatic
- Dental Plaque
- Dental Pulp Diseases
- Dental Pulp Exposure
- Dental Pulp Necrosis
- Dentin Sensitivity
- Denys-Drash Syndrome
- Depersonalization
- Depersonalization Disorder
- Depression
- Depression, Postpartum
- Depressive Disorder
- Depressive Disorder, Major
- Dermatitis
- Dermatitis Herpetiformis
- Dermatitis, Allergic Contact
- Dermatitis, Atopic
- Dermatitis, Contact
- Dermatitis, Exfoliative
- Dermatitis, Irritant
- Dermatitis, Occupational
- Dermatitis, Perioral
- Dermatitis, Photoallergic
- Dermatitis, Phototoxic
- Dermatitis, Seborrheic
- Dermatofibroma
- Dermatofibrosarcoma
- Dermatofibrosarcoma Protuberans
- Dermatomycoses
- Dermatomyositis
- Dermoid Cyst
- Desmoid Tumor
- Desmoplastic Small Round Cell Tumor
- Developmental Disabilities
- Devic Disease
- Dextrocardia
- Di Guglielmo's Syndrome
- Diabetes Complications
- Diabetes Insipidus
- Diabetes Insipidus, Nephrogenic
- Diabetes Insipidus, Neurogenic
- Diabetes Mellitus
- Diabetes Mellitus, Experimental
- Diabetes Mellitus, Type 1
- Diabetes Mellitus, Type 2
- Diabetes, Gestational
- Diabetic Angiopathies
- Diabetic Cardiomyopathies
- Diabetic Foot
- Diabetic Ketoacidosis
- Diabetic Nephropathies
- Diabetic Neuropathies
- Diabetic Retinopathy
- Diamond-Blackfan Anemia
- Diaper Rash
- Diaphragmatic Eventration
- Diaphyseal Medullary Stenosis With Malignant Fibrous Histiocytoma
- Diarrhea
- Diarrhea, Infantile
- DICER1-related Pleuropulmonary Blastoma Cancer Predisposition Syndrome
- Dientamoebiasis
- Diffuse Astrocytoma
- Diffuse Cerebral Sclerosis of Schilder
- Diffuse Gastric Cancer
- Diffuse Scleroderma
- Diffuse Systemic Sclerosis
- DiGeorge Syndrome
- Digestive System Abnormalities
- Digestive System Diseases
- Digestive System Fistula
- Digestive System Neoplasms
- Dihydroxyadeninuria
- Dilatation, Pathologic
- Dilated Cardiomyopathy
- Dilated Cardiomyopathy With Hypergonadotropic Hypogonadism
- Dipetalonema Infections
- Diphtheria
- Diplopia
- Discitis
- Disease Progression
- Disease Susceptibility
- Diseases in Twins
- Dislocations
- Disorders of Excessive Somnolence
- Disorders of Sex Development
- Disseminated Intravascular Coagulation
- Dissociative Disorders
- Distal Myopathies
- Diverticulitis
- Diverticulitis, Colonic
- Diverticulosis, Colonic
- Diverticulum
- Diverticulum, Colon
- Dizziness
- DNA Virus Infections
- Dominant Ichthyosis Vulgaris
- Donnai-Barrow Syndrome
- Dopamine Beta Hydroxylase Deficiency
- Double Outlet Right Ventricle
- Down Syndrome
- Dravet Syndrome
- Drinking Behavior
- Drowning
- Drug Hypersensitivity
- Drug Toxicity
- Drug-Induced Liver Injury
- Dry Eye Syndromes
- Dry Socket
- Dubin-Johnson Syndrome
- Duchenne Muscular Dystrophy
- Ductus Arteriosus, Patent
- Duhring Brocq Disease
- Dumping Syndrome
- Duodenal Diseases
- Duodenal Neoplasms
- Duodenal Obstruction
- Duodenal Ulcer
- Duodenitis
- Duodenogastric Reflux
- Dupuytren Contracture
- Dwarfism
- Dwarfism, Pituitary
- Dysarthria
- Dysautonomia, Familial
- Dysentery
- Dysentery, Amebic
- Dysentery, Bacillary
- Dysequilibrium Syndrome
- Dysferlinopathy
- Dysgerminoma
- Dysgeusia
- Dyskeratosis Congenita
- Dyskinesia, Drug-Induced
- Dyskinesias
- Dyslexia
- Dyslexia, Acquired
- Dyslipidemias
- Dysmenorrhea
- Dyspareunia
- Dyspepsia
- Dysphonia
- Dysplastic Nevus Syndrome
- Dyspnea
- Dyssomnias
- Dysthymic Disorder
- Dystocia
- Dystonia
- Dystonia 11
- Dystonia 12
- Dystonic Disorders
- Dystrophic Epidermolysis Bullosa
- Dystrophinopathy
- Dysuria