DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

Y36 Operations of war

  • Header · not billable
  • Codes take a 7th character

Y36 is not billable. The category heads 297 billable codes in FY2027, grouped under 11 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.

Where it sits

  1. Chapter 20 External causes of morbidity (V00-Y99)
  2. Y35-Y38 Legal intervention, operations of war, military operations, and terrorism (Y35-Y38)
  3. Y36 Operations of war
Billable codes
297
Subdivisions
11
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
0

Codes in Y36

  1. Y36.0
    War operations involving explosion of marine weapons
    Header
  2. Y36.00
    War operations involving explosion of unspecified marine weapon
    Header
    Inclusion terms 1

    Inclusion terms

    • War operations involving underwater blast NOS
  3. Y36.000
    War operations involving explosion of unspecified marine weapon, military personnel +7th: A D S
    Needs 7th characterExempt
  4. Y36.001
    War operations involving explosion of unspecified marine weapon, civilian +7th: A D S
    Needs 7th characterExempt
  5. Y36.01
    War operations involving explosion of depth-charge
    Header
  6. Y36.010
    War operations involving explosion of depth-charge, military personnel +7th: A D S
    Needs 7th characterExempt
  7. Y36.011
    War operations involving explosion of depth-charge, civilian +7th: A D S
    Needs 7th characterExempt
  8. Y36.02
    War operations involving explosion of marine mine
    Header
    Inclusion terms 1

    Inclusion terms

    • War operations involving explosion of marine mine, at sea or in harbor
  9. Y36.020
    War operations involving explosion of marine mine, military personnel +7th: A D S
    Needs 7th characterExempt
  10. Y36.021
    War operations involving explosion of marine mine, civilian +7th: A D S
    Needs 7th characterExempt
  11. Y36.03
    War operations involving explosion of sea-based artillery shell
    Header
  12. Y36.030
    War operations involving explosion of sea-based artillery shell, military personnel +7th: A D S
    Needs 7th characterExempt
  13. Y36.031
    War operations involving explosion of sea-based artillery shell, civilian +7th: A D S
    Needs 7th characterExempt
  14. Y36.04
    War operations involving explosion of torpedo
    Header
  15. Y36.040
    War operations involving explosion of torpedo, military personnel +7th: A D S
    Needs 7th characterExempt
  16. Y36.041
    War operations involving explosion of torpedo, civilian +7th: A D S
    Needs 7th characterExempt
  17. Y36.05
    War operations involving accidental detonation of onboard marine weapons
    Header
  18. Y36.050
    War operations involving accidental detonation of onboard marine weapons, military personnel +7th: A D S
    Needs 7th characterExempt
  19. Y36.051
    War operations involving accidental detonation of onboard marine weapons, civilian +7th: A D S
    Needs 7th characterExempt
  20. Y36.09
    War operations involving explosion of other marine weapons
    Header
  21. Y36.090
    War operations involving explosion of other marine weapons, military personnel +7th: A D S
    Needs 7th characterExempt
  22. Y36.091
    War operations involving explosion of other marine weapons, civilian +7th: A D S
    Needs 7th characterExempt
  23. Y36.1
    War operations involving destruction of aircraft
    Header
  24. Y36.10
    War operations involving unspecified destruction of aircraft
    Header
  25. Y36.100
    War operations involving unspecified destruction of aircraft, military personnel +7th: A D S
    Needs 7th characterExempt
  26. Y36.101
    War operations involving unspecified destruction of aircraft, civilian +7th: A D S
    Needs 7th characterExempt
  27. Y36.11
    War operations involving destruction of aircraft due to enemy fire or explosives
    Header
    Inclusion terms 5

    Inclusion terms

    • War operations involving destruction of aircraft due to air to air missile
    • War operations involving destruction of aircraft due to explosive placed on aircraft
    • War operations involving destruction of aircraft due to rocket propelled grenade [RPG]
    • War operations involving destruction of aircraft due to small arms fire
    • War operations involving destruction of aircraft due to surface to air missile
  28. Y36.110
    War operations involving destruction of aircraft due to enemy fire or explosives, military personnel +7th: A D S
    Needs 7th characterExempt
  29. Y36.111
    War operations involving destruction of aircraft due to enemy fire or explosives, civilian +7th: A D S
    Needs 7th characterExempt
  30. Y36.12
    War operations involving destruction of aircraft due to collision with other aircraft
    Header
  31. Y36.120
    War operations involving destruction of aircraft due to collision with other aircraft, military personnel +7th: A D S
    Needs 7th characterExempt
  32. Y36.121
    War operations involving destruction of aircraft due to collision with other aircraft, civilian +7th: A D S
    Needs 7th characterExempt
  33. Y36.13
    War operations involving destruction of aircraft due to onboard fire
    Header
  34. Y36.130
    War operations involving destruction of aircraft due to onboard fire, military personnel +7th: A D S
    Needs 7th characterExempt
  35. Y36.131
    War operations involving destruction of aircraft due to onboard fire, civilian +7th: A D S
    Needs 7th characterExempt
  36. Y36.14
    War operations involving destruction of aircraft due to accidental detonation of onboard munitions and explosives
    Header
  37. Y36.140
    War operations involving destruction of aircraft due to accidental detonation of onboard munitions and explosives, military personnel +7th: A D S
    Needs 7th characterExempt
  38. Y36.141
    War operations involving destruction of aircraft due to accidental detonation of onboard munitions and explosives, civilian +7th: A D S
    Needs 7th characterExempt
  39. Y36.19
    War operations involving other destruction of aircraft
    Header
  40. Y36.190
    War operations involving other destruction of aircraft, military personnel +7th: A D S
    Needs 7th characterExempt
  41. Y36.191
    War operations involving other destruction of aircraft, civilian +7th: A D S
    Needs 7th characterExempt
  42. Y36.2
    War operations involving other explosions and fragments
    Header
    Excludes1 4

    Excludes1

    • war operations involving explosion of aircraft (Y36.1-) Y36.1
    • war operations involving explosion of marine weapons (Y36.0-) Y36.0
    • war operations involving explosion of nuclear weapons (Y36.5-) Y36.5
    • war operations involving explosion occurring after cessation of hostilities (Y36.8-) Y36.8
  43. Y36.20
    War operations involving unspecified explosion and fragments
    Header
    Inclusion terms 7

    Inclusion terms

    • War operations involving air blast NOS
    • War operations involving blast NOS
    • War operations involving blast fragments NOS
    • War operations involving blast wave NOS
    • War operations involving blast wind NOS
    • War operations involving explosion NOS
    • War operations involving explosion of bomb NOS
  44. Y36.200
    War operations involving unspecified explosion and fragments, military personnel +7th: A D S
    Needs 7th characterExempt
  45. Y36.201
    War operations involving unspecified explosion and fragments, civilian +7th: A D S
    Needs 7th characterExempt
  46. Y36.21
    War operations involving explosion of aerial bomb
    Header
  47. Y36.210
    War operations involving explosion of aerial bomb, military personnel +7th: A D S
    Needs 7th characterExempt
  48. Y36.211
    War operations involving explosion of aerial bomb, civilian +7th: A D S
    Needs 7th characterExempt
  49. Y36.22
    War operations involving explosion of guided missile
    Header
  50. Y36.220
    War operations involving explosion of guided missile, military personnel +7th: A D S
    Needs 7th characterExempt
  51. Y36.221
    War operations involving explosion of guided missile, civilian +7th: A D S
    Needs 7th characterExempt
  52. Y36.23
    War operations involving explosion of improvised explosive device [IED]
    Header
    Inclusion terms 3

    Inclusion terms

    • War operations involving explosion of person-borne improvised explosive device [IED]
    • War operations involving explosion of vehicle-borne improvised explosive device [IED]
    • War operations involving explosion of roadside improvised explosive device [IED]
  53. Y36.230
    War operations involving explosion of improvised explosive device [IED], military personnel +7th: A D S
    Needs 7th characterExempt
  54. Y36.231
    War operations involving explosion of improvised explosive device [IED], civilian +7th: A D S
    Needs 7th characterExempt
  55. Y36.24
    War operations involving explosion due to accidental detonation and discharge of own munitions or munitions launch device
    Header
  56. Y36.240
    War operations involving explosion due to accidental detonation and discharge of own munitions or munitions launch device, military personnel +7th: A D S
    Needs 7th characterExempt
  57. Y36.241
    War operations involving explosion due to accidental detonation and discharge of own munitions or munitions launch device, civilian +7th: A D S
    Needs 7th characterExempt
  58. Y36.25
    War operations involving fragments from munitions
    Header
  59. Y36.250
    War operations involving fragments from munitions, military personnel +7th: A D S
    Needs 7th characterExempt
  60. Y36.251
    War operations involving fragments from munitions, civilian +7th: A D S
    Needs 7th characterExempt
  61. Y36.26
    War operations involving fragments of improvised explosive device [IED]
    Header
    Inclusion terms 3

    Inclusion terms

    • War operations involving fragments of person-borne improvised explosive device [IED]
    • War operations involving fragments of vehicle-borne improvised explosive device [IED]
    • War operations involving fragments of roadside improvised explosive device [IED]
  62. Y36.260
    War operations involving fragments of improvised explosive device [IED], military personnel +7th: A D S
    Needs 7th characterExempt
  63. Y36.261
    War operations involving fragments of improvised explosive device [IED], civilian +7th: A D S
    Needs 7th characterExempt
  64. Y36.27
    War operations involving fragments from weapons
    Header
  65. Y36.270
    War operations involving fragments from weapons, military personnel +7th: A D S
    Needs 7th characterExempt
  66. Y36.271
    War operations involving fragments from weapons, civilian +7th: A D S
    Needs 7th characterExempt
  67. Y36.29
    War operations involving other explosions and fragments
    Header
    Inclusion terms 3

    Inclusion terms

    • War operations involving explosion of grenade
    • War operations involving explosions of land mine
    • War operations involving shrapnel NOS
  68. Y36.290
    War operations involving other explosions and fragments, military personnel +7th: A D S
    Needs 7th characterExempt
  69. Y36.291
    War operations involving other explosions and fragments, civilian +7th: A D S
    Needs 7th characterExempt
  70. Y36.3
    War operations involving fires, conflagrations and hot substances
    Header
    Inclusion terms 1, Excludes1 4

    Inclusion terms

    • War operations involving smoke, fumes, and heat from fires, conflagrations and hot substances

    Excludes1

    • war operations involving fires and conflagrations aboard military aircraft (Y36.1-) Y36.1
    • war operations involving fires and conflagrations aboard military watercraft (Y36.0-) Y36.0
    • war operations involving fires and conflagrations caused indirectly by conventional weapons (Y36.2-) Y36.2
    • war operations involving fires and thermal effects of nuclear weapons (Y36.53-) Y36.53
  71. Y36.30
    War operations involving unspecified fire, conflagration and hot substance
    Header
  72. Y36.300
    War operations involving unspecified fire, conflagration and hot substance, military personnel +7th: A D S
    Needs 7th characterExempt
  73. Y36.301
    War operations involving unspecified fire, conflagration and hot substance, civilian +7th: A D S
    Needs 7th characterExempt
  74. Y36.31
    War operations involving gasoline bomb
    Header
    Inclusion terms 2

    Inclusion terms

    • War operations involving incendiary bomb
    • War operations involving petrol bomb
  75. Y36.310
    War operations involving gasoline bomb, military personnel +7th: A D S
    Needs 7th characterExempt
  76. Y36.311
    War operations involving gasoline bomb, civilian +7th: A D S
    Needs 7th characterExempt
  77. Y36.32
    War operations involving incendiary bullet
    Header
  78. Y36.320
    War operations involving incendiary bullet, military personnel +7th: A D S
    Needs 7th characterExempt
  79. Y36.321
    War operations involving incendiary bullet, civilian +7th: A D S
    Needs 7th characterExempt
  80. Y36.33
    War operations involving flamethrower
    Header
  81. Y36.330
    War operations involving flamethrower, military personnel +7th: A D S
    Needs 7th characterExempt
  82. Y36.331
    War operations involving flamethrower, civilian +7th: A D S
    Needs 7th characterExempt
  83. Y36.39
    War operations involving other fires, conflagrations and hot substances
    Header
  84. Y36.390
    War operations involving other fires, conflagrations and hot substances, military personnel +7th: A D S
    Needs 7th characterExempt
  85. Y36.391
    War operations involving other fires, conflagrations and hot substances, civilian +7th: A D S
    Needs 7th characterExempt
  86. Y36.4
    War operations involving firearm discharge and other forms of conventional warfare
    Header
  87. Y36.41
    War operations involving rubber bullets
    Header
  88. Y36.410
    War operations involving rubber bullets, military personnel +7th: A D S
    Needs 7th characterExempt
  89. Y36.411
    War operations involving rubber bullets, civilian +7th: A D S
    Needs 7th characterExempt
  90. Y36.42
    War operations involving firearms pellets
    Header
  91. Y36.420
    War operations involving firearms pellets, military personnel +7th: A D S
    Needs 7th characterExempt
  92. Y36.421
    War operations involving firearms pellets, civilian +7th: A D S
    Needs 7th characterExempt
  93. Y36.43
    War operations involving other firearms discharge
    Header
    Inclusion terms 1, Excludes1 2

    Inclusion terms

    • War operations involving bullets NOS

    Excludes1

    • war operations involving munitions fragments (Y36.25-) Y36.25
    • war operations involving incendiary bullets (Y36.32-) Y36.32
  94. Y36.430
    War operations involving other firearms discharge, military personnel +7th: A D S
    Needs 7th characterExempt
  95. Y36.431
    War operations involving other firearms discharge, civilian +7th: A D S
    Needs 7th characterExempt
  96. Y36.44
    War operations involving unarmed hand to hand combat
    Header
    Excludes1 3

    Excludes1

    • war operations involving combat using blunt or piercing object (Y36.45-) Y36.45
    • war operations involving intentional restriction of air and airway (Y36.46-) Y36.46
    • war operations involving unintentional restriction of air and airway (Y36.47-) Y36.47
  97. Y36.440
    War operations involving unarmed hand to hand combat, military personnel +7th: A D S
    Needs 7th characterExempt
  98. Y36.441
    War operations involving unarmed hand to hand combat, civilian +7th: A D S
    Needs 7th characterExempt
  99. Y36.45
    War operations involving combat using blunt or piercing object
    Header
  100. Y36.450
    War operations involving combat using blunt or piercing object, military personnel +7th: A D S
    Needs 7th characterExempt
  101. Y36.451
    War operations involving combat using blunt or piercing object, civilian +7th: A D S
    Needs 7th characterExempt
  102. Y36.46
    War operations involving intentional restriction of air and airway
    Header
  103. Y36.460
    War operations involving intentional restriction of air and airway, military personnel +7th: A D S
    Needs 7th characterExempt
  104. Y36.461
    War operations involving intentional restriction of air and airway, civilian +7th: A D S
    Needs 7th characterExempt
  105. Y36.47
    War operations involving unintentional restriction of air and airway
    Header
  106. Y36.470
    War operations involving unintentional restriction of air and airway, military personnel +7th: A D S
    Needs 7th characterExempt
  107. Y36.471
    War operations involving unintentional restriction of air and airway, civilian +7th: A D S
    Needs 7th characterExempt
  108. Y36.49
    War operations involving other forms of conventional warfare
    Header
  109. Y36.490
    War operations involving other forms of conventional warfare, military personnel +7th: A D S
    Needs 7th characterExempt
  110. Y36.491
    War operations involving other forms of conventional warfare, civilian +7th: A D S
    Needs 7th characterExempt
  111. Y36.5
    War operations involving nuclear weapons
    Header
    Inclusion terms 1

    Inclusion terms

    • War operations involving dirty bomb NOS
  112. Y36.50
    War operations involving unspecified effect of nuclear weapon
    Header
  113. Y36.500
    War operations involving unspecified effect of nuclear weapon, military personnel +7th: A D S
    Needs 7th characterExempt
  114. Y36.501
    War operations involving unspecified effect of nuclear weapon, civilian +7th: A D S
    Needs 7th characterExempt
  115. Y36.51
    War operations involving direct blast effect of nuclear weapon
    Header
    Inclusion terms 1

    Inclusion terms

    • War operations involving blast pressure of nuclear weapon
  116. Y36.510
    War operations involving direct blast effect of nuclear weapon, military personnel +7th: A D S
    Needs 7th characterExempt
  117. Y36.511
    War operations involving direct blast effect of nuclear weapon, civilian +7th: A D S
    Needs 7th characterExempt
  118. Y36.52
    War operations involving indirect blast effect of nuclear weapon
    Header
    Inclusion terms 2

    Inclusion terms

    • War operations involving being thrown by blast of nuclear weapon
    • War operations involving being struck or crushed by blast debris of nuclear weapon
  119. Y36.520
    War operations involving indirect blast effect of nuclear weapon, military personnel +7th: A D S
    Needs 7th characterExempt
  120. Y36.521
    War operations involving indirect blast effect of nuclear weapon, civilian +7th: A D S
    Needs 7th characterExempt
  121. Y36.53
    War operations involving thermal radiation effect of nuclear weapon
    Header
    Inclusion terms 2

    Inclusion terms

    • War operations involving direct heat from nuclear weapon
    • War operation involving fireball effects from nuclear weapon
  122. Y36.530
    War operations involving thermal radiation effect of nuclear weapon, military personnel +7th: A D S
    Needs 7th characterExempt
  123. Y36.531
    War operations involving thermal radiation effect of nuclear weapon, civilian +7th: A D S
    Needs 7th characterExempt
  124. Y36.54
    War operation involving nuclear radiation effects of nuclear weapon
    Header
    Inclusion terms 4

    Inclusion terms

    • War operation involving acute radiation exposure from nuclear weapon
    • War operation involving exposure to immediate ionizing radiation from nuclear weapon
    • War operation involving fallout exposure from nuclear weapon
    • War operation involving secondary effects of nuclear weapons
  125. Y36.540
    War operation involving nuclear radiation effects of nuclear weapon, military personnel +7th: A D S
    Needs 7th characterExempt
  126. Y36.541
    War operation involving nuclear radiation effects of nuclear weapon, civilian +7th: A D S
    Needs 7th characterExempt
  127. Y36.59
    War operation involving other effects of nuclear weapons
    Header
  128. Y36.590
    War operation involving other effects of nuclear weapons, military personnel +7th: A D S
    Needs 7th characterExempt
  129. Y36.591
    War operation involving other effects of nuclear weapons, civilian +7th: A D S
    Needs 7th characterExempt
  130. Y36.6
    War operations involving biological weapons
    Header
  131. Y36.6X
    War operations involving biological weapons
    Header
  132. Y36.6X0
    War operations involving biological weapons, military personnel +7th: A D S
    Needs 7th characterExempt
  133. Y36.6X1
    War operations involving biological weapons, civilian +7th: A D S
    Needs 7th characterExempt
  134. Y36.7
    War operations involving chemical weapons and other forms of unconventional warfare
    Header
    Excludes1 1

    Excludes1

    • war operations involving incendiary devices (Y36.3-, Y36.5-) Y36.3 Y36.5
  135. Y36.7X
    War operations involving chemical weapons and other forms of unconventional warfare
    Header
  136. Y36.7X0
    War operations involving chemical weapons and other forms of unconventional warfare, military personnel +7th: A D S
    Needs 7th characterExempt
  137. Y36.7X1
    War operations involving chemical weapons and other forms of unconventional warfare, civilian +7th: A D S
    Needs 7th characterExempt
  138. Y36.8
    War operations occurring after cessation of hostilities
    Header
    Inclusion terms 1

    Inclusion terms

    • War operations classifiable to categories Y36.0-Y36.8 but occurring after cessation of hostilities Y36.0 Y36.8
  139. Y36.81
    Explosion of mine placed during war operations but exploding after cessation of hostilities
    Header
  140. Y36.810
    Explosion of mine placed during war operations but exploding after cessation of hostilities, military personnel +7th: A D S
    Needs 7th characterExempt
  141. Y36.811
    Explosion of mine placed during war operations but exploding after cessation of hostilities, civilian +7th: A D S
    Needs 7th characterExempt
  142. Y36.82
    Explosion of bomb placed during war operations but exploding after cessation of hostilities
    Header
  143. Y36.820
    Explosion of bomb placed during war operations but exploding after cessation of hostilities, military personnel +7th: A D S
    Needs 7th characterExempt
  144. Y36.821
    Explosion of bomb placed during war operations but exploding after cessation of hostilities, civilian +7th: A D S
    Needs 7th characterExempt
  145. Y36.88
    Other war operations occurring after cessation of hostilities
    Header
  146. Y36.880
    Other war operations occurring after cessation of hostilities, military personnel +7th: A D S
    Needs 7th characterExempt
  147. Y36.881
    Other war operations occurring after cessation of hostilities, civilian +7th: A D S
    Needs 7th characterExempt
  148. Y36.89
    Unspecified war operations occurring after cessation of hostilities
    Header
  149. Y36.890
    Unspecified war operations occurring after cessation of hostilities, military personnel +7th: A D S
    Needs 7th characterExempt
  150. Y36.891
    Unspecified war operations occurring after cessation of hostilities, civilian +7th: A D S
    Needs 7th characterExempt
  151. Y36.9
    Other and unspecified war operations
    Header
  152. Y36.90
    War operations, unspecified +7th: A D S
    Needs 7th characterExempt
  153. Y36.91
    War operations involving unspecified weapon of mass destruction [WMD] +7th: A D S
    Needs 7th characterExempt
  154. Y36.92
    War operations involving friendly fire +7th: A D S
    Needs 7th characterExempt
  155. Y36.A
    Blast overpressure in war operations
    Header
    Code also 5

    Code also

    • type of explosive, if known
    • accidental detonation of onboard munitions (Y36.140) Y36.140
    • explosion of grenade (Y36.290) Y36.290
    • explosion of torpedo (Y36.040) Y36.040
    • improvised explosive device (Y36.230) Y36.230
  156. Y36.A1
    Low level blast overpressure in war operations +7th: A D S
    Needs 7th characterExempt
    Inclusion terms 2

    Inclusion terms

    • LLB overpressure in war operations
    • Low level blast overpressure due to explosion in war operations
  157. Y36.A2
    High level blast overpressure in war operations +7th: A D S
    Needs 7th characterExempt
    Inclusion terms 2

    Inclusion terms

    • High level blast overpressure due to explosion in war operations
    • HLB overpressure in war operations

Sources of each column. Rows marked +7th need a 7th character: pick one to build the full code; its code card has its own flags.

Instructions

At Y36

Includes

  • injuries to military personnel and civilians caused by war, civil insurrection, and peacekeeping missions

Excludes1

  • injury to military personnel occurring during peacetime military operations (Y37.-) Y37
  • military vehicles involved in transport accidents with non-military vehicle during peacetime (V09.01, V09.21, V19.81, V29.818, V39.81, V49.81, V59.81, V69.81, V79.81) V09.01 V09.21 V19.81 V29.818 V39.81 V49.81 V59.81 V69.81 V79.81

Notes that also apply

Chapter 20 instructions (Notes 1): printed on the chapter 20 page.

7th characters

7th characters for Y36 defined here

The appropriate 7th character is to be added to each code from category Y36

7th characters for Y36
7thMeaning (NCHS)
Ainitial encounter
Dsubsequent encounter
Ssequela

A code that takes a 7th character is invalid without it; the placeholder X fills a code shorter than 6 characters (Official Guidelines I.A.5). How 7th characters work.

Hierarchy