DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

T46 Poisoning by, adverse effect of and underdosing of agents primarily affecting the cardiovascular system

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

T46 is not billable. The category heads 198 billable codes in FY2027, grouped under 10 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.

Billable codes
198
Subdivisions
10
CC / MCC codes
0 / 0
HCC V28 codes
11
New FY2027
0
Index entries
0

Codes in T46

  1. T46.0
    Poisoning by, adverse effect of and underdosing of cardiac-stimulant glycosides and drugs of similar action
    Header
  2. T46.0X
    Poisoning by, adverse effect of and underdosing of cardiac-stimulant glycosides and drugs of similar action
    Header
  3. T46.0X1
    Poisoning by cardiac-stimulant glycosides and drugs of similar action, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by cardiac-stimulant glycosides and drugs of similar action NOS
  4. T46.0X2
    Poisoning by cardiac-stimulant glycosides and drugs of similar action, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  5. T46.0X3
    Poisoning by cardiac-stimulant glycosides and drugs of similar action, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  6. T46.0X4
    Poisoning by cardiac-stimulant glycosides and drugs of similar action, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  7. T46.0X5
    Adverse effect of cardiac-stimulant glycosides and drugs of similar action +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  8. T46.0X6
    Underdosing of cardiac-stimulant glycosides and drugs of similar action +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  9. T46.1
    Poisoning by, adverse effect of and underdosing of calcium-channel blockers
    Header
  10. T46.1X
    Poisoning by, adverse effect of and underdosing of calcium-channel blockers
    Header
  11. T46.1X1
    Poisoning by calcium-channel blockers, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by calcium-channel blockers NOS
  12. T46.1X2
    Poisoning by calcium-channel blockers, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  13. T46.1X3
    Poisoning by calcium-channel blockers, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  14. T46.1X4
    Poisoning by calcium-channel blockers, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  15. T46.1X5
    Adverse effect of calcium-channel blockers +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  16. T46.1X6
    Underdosing of calcium-channel blockers +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  17. T46.2
    Poisoning by, adverse effect of and underdosing of other antidysrhythmic drugs, not elsewhere classified
    Header
    Excludes1 1

    Excludes1

    • poisoning by, adverse effect of and underdosing of beta-adrenoreceptor antagonists (T44.7-) T44.7
  18. T46.2X
    Poisoning by, adverse effect of and underdosing of other antidysrhythmic drugs
    Header
  19. T46.2X1
    Poisoning by other antidysrhythmic drugs, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by other antidysrhythmic drugs NOS
  20. T46.2X2
    Poisoning by other antidysrhythmic drugs, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  21. T46.2X3
    Poisoning by other antidysrhythmic drugs, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  22. T46.2X4
    Poisoning by other antidysrhythmic drugs, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  23. T46.2X5
    Adverse effect of other antidysrhythmic drugs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  24. T46.2X6
    Underdosing of other antidysrhythmic drugs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  25. T46.3
    Poisoning by, adverse effect of and underdosing of coronary vasodilators
    Header
    Inclusion terms 1, Excludes1 2

    Inclusion terms

    • Poisoning by, adverse effect of and underdosing of dipyridamole

    Excludes1

    • poisoning by, adverse effect of and underdosing of
    • calcium-channel blockers (T46.1) T46.1
  26. T46.3X
    Poisoning by, adverse effect of and underdosing of coronary vasodilators
    Header
  27. T46.3X1
    Poisoning by coronary vasodilators, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by coronary vasodilators NOS
  28. T46.3X2
    Poisoning by coronary vasodilators, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  29. T46.3X3
    Poisoning by coronary vasodilators, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  30. T46.3X4
    Poisoning by coronary vasodilators, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  31. T46.3X5
    Adverse effect of coronary vasodilators +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  32. T46.3X6
    Underdosing of coronary vasodilators +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  33. T46.4
    Poisoning by, adverse effect of and underdosing of angiotensin-converting-enzyme inhibitors
    Header
  34. T46.4X
    Poisoning by, adverse effect of and underdosing of angiotensin-converting-enzyme inhibitors
    Header
  35. T46.4X1
    Poisoning by angiotensin-converting-enzyme inhibitors, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by angiotensin-converting-enzyme inhibitors NOS
  36. T46.4X2
    Poisoning by angiotensin-converting-enzyme inhibitors, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  37. T46.4X3
    Poisoning by angiotensin-converting-enzyme inhibitors, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  38. T46.4X4
    Poisoning by angiotensin-converting-enzyme inhibitors, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  39. T46.4X5
    Adverse effect of angiotensin-converting-enzyme inhibitors +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  40. T46.4X6
    Underdosing of angiotensin-converting-enzyme inhibitors +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  41. T46.5
    Poisoning by, adverse effect of and underdosing of other antihypertensive drugs
    Header
    Excludes2 3

    Excludes2

    • poisoning by, adverse effect of and underdosing of beta-adrenoreceptor antagonists (T44.7) T44.7
    • poisoning by, adverse effect of and underdosing of calcium-channel blockers (T46.1) T46.1
    • poisoning by, adverse effect of and underdosing of diuretics (T50.0-T50.2) T50.0 T50.2
  42. T46.5X
    Poisoning by, adverse effect of and underdosing of other antihypertensive drugs
    Header
  43. T46.5X1
    Poisoning by other antihypertensive drugs, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by other antihypertensive drugs NOS
  44. T46.5X2
    Poisoning by other antihypertensive drugs, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  45. T46.5X3
    Poisoning by other antihypertensive drugs, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  46. T46.5X4
    Poisoning by other antihypertensive drugs, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  47. T46.5X5
    Adverse effect of other antihypertensive drugs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  48. T46.5X6
    Underdosing of other antihypertensive drugs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  49. T46.6
    Poisoning by, adverse effect of and underdosing of antihyperlipidemic and antiarteriosclerotic drugs
    Header
  50. T46.6X
    Poisoning by, adverse effect of and underdosing of antihyperlipidemic and antiarteriosclerotic drugs
    Header
  51. T46.6X1
    Poisoning by antihyperlipidemic and antiarteriosclerotic drugs, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by antihyperlipidemic and antiarteriosclerotic drugs NOS
  52. T46.6X2
    Poisoning by antihyperlipidemic and antiarteriosclerotic drugs, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  53. T46.6X3
    Poisoning by antihyperlipidemic and antiarteriosclerotic drugs, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  54. T46.6X4
    Poisoning by antihyperlipidemic and antiarteriosclerotic drugs, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  55. T46.6X5
    Adverse effect of antihyperlipidemic and antiarteriosclerotic drugs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  56. T46.6X6
    Underdosing of antihyperlipidemic and antiarteriosclerotic drugs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  57. T46.7
    Poisoning by, adverse effect of and underdosing of peripheral vasodilators
    Header
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Poisoning by, adverse effect of and underdosing of nicotinic acid (derivatives)

    Excludes1

    • poisoning by, adverse effect of and underdosing of papaverine (T44.3) T44.3
  58. T46.7X
    Poisoning by, adverse effect of and underdosing of peripheral vasodilators
    Header
  59. T46.7X1
    Poisoning by peripheral vasodilators, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by peripheral vasodilators NOS
  60. T46.7X2
    Poisoning by peripheral vasodilators, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  61. T46.7X3
    Poisoning by peripheral vasodilators, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  62. T46.7X4
    Poisoning by peripheral vasodilators, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  63. T46.7X5
    Adverse effect of peripheral vasodilators +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  64. T46.7X6
    Underdosing of peripheral vasodilators +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  65. T46.8
    Poisoning by, adverse effect of and underdosing of antivaricose drugs, including sclerosing agents
    Header
  66. T46.8X
    Poisoning by, adverse effect of and underdosing of antivaricose drugs, including sclerosing agents
    Header
  67. T46.8X1
    Poisoning by antivaricose drugs, including sclerosing agents, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by antivaricose drugs, including sclerosing agents NOS
  68. T46.8X2
    Poisoning by antivaricose drugs, including sclerosing agents, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  69. T46.8X3
    Poisoning by antivaricose drugs, including sclerosing agents, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  70. T46.8X4
    Poisoning by antivaricose drugs, including sclerosing agents, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  71. T46.8X5
    Adverse effect of antivaricose drugs, including sclerosing agents +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  72. T46.8X6
    Underdosing of antivaricose drugs, including sclerosing agents +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  73. T46.9
    Poisoning by, adverse effect of and underdosing of other and unspecified agents primarily affecting the cardiovascular system
    Header
  74. T46.90
    Poisoning by, adverse effect of and underdosing of unspecified agents primarily affecting the cardiovascular system
    Header
  75. T46.901
    Poisoning by unspecified agents primarily affecting the cardiovascular system, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  76. T46.902
    Poisoning by unspecified agents primarily affecting the cardiovascular system, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  77. T46.903
    Poisoning by unspecified agents primarily affecting the cardiovascular system, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  78. T46.904
    Poisoning by unspecified agents primarily affecting the cardiovascular system, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  79. T46.905
    Adverse effect of unspecified agents primarily affecting the cardiovascular system +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  80. T46.906
    Underdosing of unspecified agents primarily affecting the cardiovascular system +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  81. T46.99
    Poisoning by, adverse effect of and underdosing of other agents primarily affecting the cardiovascular system
    Header
  82. T46.991
    Poisoning by other agents primarily affecting the cardiovascular system, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  83. T46.992
    Poisoning by other agents primarily affecting the cardiovascular system, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  84. T46.993
    Poisoning by other agents primarily affecting the cardiovascular system, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  85. T46.994
    Poisoning by other agents primarily affecting the cardiovascular system, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  86. T46.995
    Adverse effect of other agents primarily affecting the cardiovascular system +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  87. T46.996
    Underdosing of other agents primarily affecting the cardiovascular system +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters

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 T46

Excludes1

  • poisoning by, adverse effect of and underdosing of metaraminol (T44.4) T44.4

Notes that also apply

Block T36-T50 instructions (Notes 1, Includes 4, Excludes1 1, Excludes2 5, Code first 7, Use additional code 4): printed on the block page.

Chapter 19 instructions (Notes 2, Excludes2 2, Use additional code 1): printed on the chapter 19 page.

7th characters

7th characters for T46 defined here

The appropriate 7th character is to be added to each code from category T46

7th characters for T46
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