- Waiting list, person on, Z75.1
- Waldenström
- Waldenström-Kjellberg syndrome, D50.1
- Walking
- Wall, abdominal
- Wallenberg\’s disease or syndrome, G46.3
- Wallgren\’s disease, I87.8
- Wandering
- War neurosis, F48.8
- Wart (due to HPV) (filiform) (infectious) (viral), B07.9
- Warthin\’s tumor
- Wassilieff\’s disease, A27.0
- Wasting
- Water
- Water-losing nephritis, N25.89
- Waterbrash, R12
- Waterhouse (-Friderichsen) syndrome or disease (meningococcal), A39.1
- Watermelon stomach, K31.819
- Watsoniasis, B66.8
- Wax in ear
- Weak, weakening, weakness (generalized), R53.1
- Wear, worn (with normal or routine use)
- Weather, weathered
- Weaver\’s syndrome, Q87.3
- Web, webbed (congenital)
- Weber-Christian disease, M35.6
- Weber-Cockayne syndrome (epidermolysis bullosa), Q81.8
- Weber-Gubler syndrome, G46.3
- Weber-Leyden syndrome, G46.3
- Weber-Osler syndrome, I78.0
- Weber\’s paralysis or syndrome, G46.3
- Wedge-shaped or wedging vertebra
- Wegener\’s granulomatosis or syndrome, M31.30
- Wegner\’s disease, A50.02
- Weight
- Weightlessness (effect of), T75.82
- Weil-Marchesani syndrome (l), Q87.19
- Weil\’s disease, A27.0
- Weingarten\’s syndrome, J82.89
- Weir Mitchell\’s disease, I73.81
- Weiss-Baker syndrome, G90.09
- Wells\’ disease, L98.3
- Wen
- Wenckebach\’s block or phenomenon, I44.1
- Werdnig-Hoffmann syndrome (muscular atrophy), G12.0
- Werlhof\’s disease, D69.3
- Wermer\’s disease or syndrome, E31.21
- Werner-His disease, A79.0
- Werner\’s disease or syndrome, E34.8
- Wernicke-Korsakoff\’s syndrome or psychosis (alcoholic), F10.96
- Wernicke-Posadas disease, B38.9
- Wernicke\’s
- West African fever, B50.8
- Westphal-Strümpell syndrome, E83.01
- West\’s syndrome
- Wet
- Wharton\’s duct
- Wheal
- Wheezing, R06.2
- Whiplash injury, S13.4
- Whipple\’s disease, K90.81
- Whipworm (disease) (infection) (infestation), B79
- Whistling face, Q87.0
- White
- Whitehead, L70.0
- Whitlow
- Whitmore\’s disease or fever
- Whooping cough, A37.90
- Wichman\’s asthma, J38.5
- Wide cranial sutures, newborn, P96.3
- Widening aorta
- Wilkie\’s disease or syndrome, K55.1
- Wilkinson-Sneddon disease or syndrome, L13.1
- Willebrand thrombopathy (-Jürgens)
- Williams syndrome, Q93.82
- Willige-Hunt disease or syndrome, G23.1
- Wilms\’ tumor, C64-
- Wilson-Mikity syndrome, P27.0
- Wilson\’s
- Window
- Winter
- Wiskott-Aldrich syndrome, D82.0
- Withdrawal state
- Witts\’ anemia, D50.8
- Witzelsucht, F07.0
- Woakes\’ ethmoiditis or syndrome, J33.1
- Wolff-Hirschorn syndrome, Q93.3
- Wolff-Parkinson-White syndrome, I45.6
- Wolhynian fever, A79.0
- Wolman\’s disease, E75.5
- Wood lung or pneumonitis, J67.8
- Woolly, wooly hair (congenital) (nevus), Q84.1
- Woolsorter\’s disease, A22.1
- Word
- Worm (s) (infection) (infestation)
- Worm-eaten soles, A66.3
- Worn out
- Worried well, Z71.1
- Worries, R45.82
- Wound check, Z48.0-
- Wound, open, T14.8-
- Wound, superficial
- Wright\’s syndrome, G54.0
- Wrist
- Wrong drug (by accident) (given in error)
- Wry neck
- Wuchereria infestation (bancrofti), B74.0
- Wuchereriasis, B74.0
- Wuchernde Struma Langhans, C73