- Waardenburg's syndrome 756.89
- Waardenburg-Klein syndrome (ptosis-epicanthus) 270.2
- Wagner (-Unverricht) syndrome (dermatomyositis) 710.3
- Wagner's disease (colloid milium) 709.3
- Waiting list, person on V63.2
- Wakefulness disorder (see also Hypersomnia) 780.54
- Waldenström's
- Waldenström-Kjellberg syndrome (sideropenic dysphagia) 280.8
- Walking
- Wall, abdominal - see condition
- Wallenberg's syndrome (posterior inferior cerebellar artery) (see also Disease, cerebrovascular, acute) 436
- Wallgren's
- Wandering
- War neurosis 300.16
- Wardrop's disease (with lymphangitis) 681.9
- Wart (digitate) (filiform) (infectious) (viral) 078.10
- Warthin's tumor (salivary gland) (M8561/0) 210.2
- Washerwoman's itch 692.4
- Wassilieff's disease (leptospiral jaundice) 100.0
- Wasting
- Water
- Water-hammer pulse (see also Insufficiency, aortic) 424.1
