DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

T50 Poisoning by, adverse effect of and underdosing of diuretics and other and unspecified drugs, medicaments and biological substances

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

T50 is not billable. The category heads 342 billable codes in FY2027, grouped under 13 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.

Where it sits

  1. Chapter 19 Injury, poisoning and certain other consequences of external causes (S00-T88)
  2. T36-T50 Poisoning by, adverse effects of and underdosing of drugs, medicaments and biological substances (T36-T50)
  3. T50 Poisoning by, adverse effect of and underdosing of diuretics and other and unspecified drugs, medicaments and biological substances
Billable codes
342
Subdivisions
13
CC / MCC codes
0 / 0
HCC V28 codes
19
New FY2027
0
Index entries
0

Codes in T50

  1. T50.0
    Poisoning by, adverse effect of and underdosing of mineralocorticoids and their antagonists
    Header
  2. T50.0X
    Poisoning by, adverse effect of and underdosing of mineralocorticoids and their antagonists
    Header
  3. T50.0X1
    Poisoning by mineralocorticoids and their antagonists, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by mineralocorticoids and their antagonists NOS
  4. T50.0X2
    Poisoning by mineralocorticoids and their antagonists, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  5. T50.0X3
    Poisoning by mineralocorticoids and their antagonists, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  6. T50.0X4
    Poisoning by mineralocorticoids and their antagonists, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  7. T50.0X5
    Adverse effect of mineralocorticoids and their antagonists +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  8. T50.0X6
    Underdosing of mineralocorticoids and their antagonists +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  9. T50.1
    Poisoning by, adverse effect of and underdosing of loop [high-ceiling] diuretics
    Header
  10. T50.1X
    Poisoning by, adverse effect of and underdosing of loop [high-ceiling] diuretics
    Header
  11. T50.1X1
    Poisoning by loop [high-ceiling] diuretics, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by loop [high-ceiling] diuretics NOS
  12. T50.1X2
    Poisoning by loop [high-ceiling] diuretics, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  13. T50.1X3
    Poisoning by loop [high-ceiling] diuretics, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  14. T50.1X4
    Poisoning by loop [high-ceiling] diuretics, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  15. T50.1X5
    Adverse effect of loop [high-ceiling] diuretics +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  16. T50.1X6
    Underdosing of loop [high-ceiling] diuretics +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  17. T50.2
    Poisoning by, adverse effect of and underdosing of carbonic-anhydrase inhibitors, benzothiadiazides and other diuretics
    Header
    Inclusion terms 1

    Inclusion terms

    • Poisoning by, adverse effect of and underdosing of acetazolamide
  18. T50.2X
    Poisoning by, adverse effect of and underdosing of carbonic-anhydrase inhibitors, benzothiadiazides and other diuretics
    Header
  19. T50.2X1
    Poisoning by carbonic-anhydrase inhibitors, benzothiadiazides and other diuretics, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by carbonic-anhydrase inhibitors, benzothiadiazides and other diuretics NOS
  20. T50.2X2
    Poisoning by carbonic-anhydrase inhibitors, benzothiadiazides and other diuretics, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  21. T50.2X3
    Poisoning by carbonic-anhydrase inhibitors, benzothiadiazides and other diuretics, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  22. T50.2X4
    Poisoning by carbonic-anhydrase inhibitors, benzothiadiazides and other diuretics, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  23. T50.2X5
    Adverse effect of carbonic-anhydrase inhibitors, benzothiadiazides and other diuretics +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  24. T50.2X6
    Underdosing of carbonic-anhydrase inhibitors, benzothiadiazides and other diuretics +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  25. T50.3
    Poisoning by, adverse effect of and underdosing of electrolytic, caloric and water-balance agents
    Header
    Inclusion terms 1

    Inclusion terms

    • Poisoning by, adverse effect of and underdosing of oral rehydration salts
  26. T50.3X
    Poisoning by, adverse effect of and underdosing of electrolytic, caloric and water-balance agents
    Header
  27. T50.3X1
    Poisoning by electrolytic, caloric and water-balance agents, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by electrolytic, caloric and water-balance agents NOS
  28. T50.3X2
    Poisoning by electrolytic, caloric and water-balance agents, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  29. T50.3X3
    Poisoning by electrolytic, caloric and water-balance agents, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  30. T50.3X4
    Poisoning by electrolytic, caloric and water-balance agents, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  31. T50.3X5
    Adverse effect of electrolytic, caloric and water-balance agents +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  32. T50.3X6
    Underdosing of electrolytic, caloric and water-balance agents +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  33. T50.4
    Poisoning by, adverse effect of and underdosing of drugs affecting uric acid metabolism
    Header
  34. T50.4X
    Poisoning by, adverse effect of and underdosing of drugs affecting uric acid metabolism
    Header
  35. T50.4X1
    Poisoning by drugs affecting uric acid metabolism, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by drugs affecting uric acid metabolism NOS
  36. T50.4X2
    Poisoning by drugs affecting uric acid metabolism, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  37. T50.4X3
    Poisoning by drugs affecting uric acid metabolism, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  38. T50.4X4
    Poisoning by drugs affecting uric acid metabolism, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  39. T50.4X5
    Adverse effect of drugs affecting uric acid metabolism +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  40. T50.4X6
    Underdosing of drugs affecting uric acid metabolism +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  41. T50.5
    Poisoning by, adverse effect of and underdosing of appetite depressants
    Header
  42. T50.5X
    Poisoning by, adverse effect of and underdosing of appetite depressants
    Header
  43. T50.5X1
    Poisoning by appetite depressants, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by appetite depressants NOS
  44. T50.5X2
    Poisoning by appetite depressants, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  45. T50.5X3
    Poisoning by appetite depressants, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  46. T50.5X4
    Poisoning by appetite depressants, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  47. T50.5X5
    Adverse effect of appetite depressants +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  48. T50.5X6
    Underdosing of appetite depressants +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  49. T50.6
    Poisoning by, adverse effect of and underdosing of antidotes and chelating agents
    Header
    Inclusion terms 1

    Inclusion terms

    • Poisoning by, adverse effect of and underdosing of alcohol deterrents
  50. T50.6X
    Poisoning by, adverse effect of and underdosing of antidotes and chelating agents
    Header
  51. T50.6X1
    Poisoning by antidotes and chelating agents, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by antidotes and chelating agents NOS
  52. T50.6X2
    Poisoning by antidotes and chelating agents, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  53. T50.6X3
    Poisoning by antidotes and chelating agents, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  54. T50.6X4
    Poisoning by antidotes and chelating agents, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  55. T50.6X5
    Adverse effect of antidotes and chelating agents +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  56. T50.6X6
    Underdosing of antidotes and chelating agents +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  57. T50.7
    Poisoning by, adverse effect of and underdosing of analeptics and opioid receptor antagonists
    Header
  58. T50.7X
    Poisoning by, adverse effect of and underdosing of analeptics and opioid receptor antagonists
    Header
  59. T50.7X1
    Poisoning by analeptics and opioid receptor antagonists, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by analeptics and opioid receptor antagonists NOS
  60. T50.7X2
    Poisoning by analeptics and opioid receptor antagonists, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  61. T50.7X3
    Poisoning by analeptics and opioid receptor antagonists, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  62. T50.7X4
    Poisoning by analeptics and opioid receptor antagonists, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  63. T50.7X5
    Adverse effect of analeptics and opioid receptor antagonists +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  64. T50.7X6
    Underdosing of analeptics and opioid receptor antagonists +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  65. T50.8
    Poisoning by, adverse effect of and underdosing of diagnostic agents
    Header
  66. T50.8X
    Poisoning by, adverse effect of and underdosing of diagnostic agents
    Header
  67. T50.8X1
    Poisoning by diagnostic agents, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by diagnostic agents NOS
  68. T50.8X2
    Poisoning by diagnostic agents, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  69. T50.8X3
    Poisoning by diagnostic agents, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  70. T50.8X4
    Poisoning by diagnostic agents, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  71. T50.8X5
    Adverse effect of diagnostic agents +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  72. T50.8X6
    Underdosing of diagnostic agents +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  73. T50.A
    Poisoning by, adverse effect of and underdosing of bacterial vaccines
    Header
  74. T50.A1
    Poisoning by, adverse effect of and underdosing of pertussis vaccine, including combinations with a pertussis component
    Header
  75. T50.A11
    Poisoning by pertussis vaccine, including combinations with a pertussis component, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  76. T50.A12
    Poisoning by pertussis vaccine, including combinations with a pertussis component, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  77. T50.A13
    Poisoning by pertussis vaccine, including combinations with a pertussis component, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  78. T50.A14
    Poisoning by pertussis vaccine, including combinations with a pertussis component, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  79. T50.A15
    Adverse effect of pertussis vaccine, including combinations with a pertussis component +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  80. T50.A16
    Underdosing of pertussis vaccine, including combinations with a pertussis component +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  81. T50.A2
    Poisoning by, adverse effect of and underdosing of mixed bacterial vaccines without a pertussis component
    Header
  82. T50.A21
    Poisoning by mixed bacterial vaccines without a pertussis component, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  83. T50.A22
    Poisoning by mixed bacterial vaccines without a pertussis component, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  84. T50.A23
    Poisoning by mixed bacterial vaccines without a pertussis component, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  85. T50.A24
    Poisoning by mixed bacterial vaccines without a pertussis component, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  86. T50.A25
    Adverse effect of mixed bacterial vaccines without a pertussis component +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  87. T50.A26
    Underdosing of mixed bacterial vaccines without a pertussis component +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  88. T50.A9
    Poisoning by, adverse effect of and underdosing of other bacterial vaccines
    Header
  89. T50.A91
    Poisoning by other bacterial vaccines, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  90. T50.A92
    Poisoning by other bacterial vaccines, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  91. T50.A93
    Poisoning by other bacterial vaccines, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  92. T50.A94
    Poisoning by other bacterial vaccines, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  93. T50.A95
    Adverse effect of other bacterial vaccines +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  94. T50.A96
    Underdosing of other bacterial vaccines +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  95. T50.B
    Poisoning by, adverse effect of and underdosing of viral vaccines
    Header
  96. T50.B1
    Poisoning by, adverse effect of and underdosing of smallpox vaccines
    Header
  97. T50.B11
    Poisoning by smallpox vaccines, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  98. T50.B12
    Poisoning by smallpox vaccines, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  99. T50.B13
    Poisoning by smallpox vaccines, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  100. T50.B14
    Poisoning by smallpox vaccines, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  101. T50.B15
    Adverse effect of smallpox vaccines +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  102. T50.B16
    Underdosing of smallpox vaccines +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  103. T50.B9
    Poisoning by, adverse effect of and underdosing of other viral vaccines
    Header
  104. T50.B91
    Poisoning by other viral vaccines, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  105. T50.B92
    Poisoning by other viral vaccines, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  106. T50.B93
    Poisoning by other viral vaccines, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  107. T50.B94
    Poisoning by other viral vaccines, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  108. T50.B95
    Adverse effect of other viral vaccines +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  109. T50.B96
    Underdosing of other viral vaccines +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  110. T50.Z
    Poisoning by, adverse effect of and underdosing of other vaccines and biological substances
    Header
  111. T50.Z1
    Poisoning by, adverse effect of and underdosing of immunoglobulin
    Header
  112. T50.Z11
    Poisoning by immunoglobulin, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  113. T50.Z12
    Poisoning by immunoglobulin, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  114. T50.Z13
    Poisoning by immunoglobulin, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  115. T50.Z14
    Poisoning by immunoglobulin, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  116. T50.Z15
    Adverse effect of immunoglobulin +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  117. T50.Z16
    Underdosing of immunoglobulin +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  118. T50.Z9
    Poisoning by, adverse effect of and underdosing of other vaccines and biological substances
    Header
  119. T50.Z91
    Poisoning by other vaccines and biological substances, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  120. T50.Z92
    Poisoning by other vaccines and biological substances, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  121. T50.Z93
    Poisoning by other vaccines and biological substances, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  122. T50.Z94
    Poisoning by other vaccines and biological substances, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  123. T50.Z95
    Adverse effect of other vaccines and biological substances +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  124. T50.Z96
    Underdosing of other vaccines and biological substances +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  125. T50.9
    Poisoning by, adverse effect of and underdosing of other and unspecified drugs, medicaments and biological substances
    Header
  126. T50.90
    Poisoning by, adverse effect of and underdosing of unspecified drugs, medicaments and biological substances
    Header
  127. T50.901
    Poisoning by unspecified drugs, medicaments and biological substances, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  128. T50.902
    Poisoning by unspecified drugs, medicaments and biological substances, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  129. T50.903
    Poisoning by unspecified drugs, medicaments and biological substances, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  130. T50.904
    Poisoning by unspecified drugs, medicaments and biological substances, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  131. T50.905
    Adverse effect of unspecified drugs, medicaments and biological substances +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  132. T50.906
    Underdosing of unspecified drugs, medicaments and biological substances +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  133. T50.91
    Poisoning by, adverse effect of and underdosing of multiple unspecified drugs, medicaments and biological substances
    Header
    Inclusion terms 1, Code also 1

    Inclusion terms

    • Multiple drug ingestion NOS

    Code also

    • any specific drugs, medicaments and biological substances
  134. T50.911
    Poisoning by multiple unspecified drugs, medicaments and biological substances, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  135. T50.912
    Poisoning by multiple unspecified drugs, medicaments and biological substances, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  136. T50.913
    Poisoning by multiple unspecified drugs, medicaments and biological substances, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  137. T50.914
    Poisoning by multiple unspecified drugs, medicaments and biological substances, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  138. T50.915
    Adverse effect of multiple unspecified drugs, medicaments and biological substances +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  139. T50.916
    Underdosing of multiple unspecified drugs, medicaments and biological substances +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  140. T50.99
    Poisoning by, adverse effect of and underdosing of other drugs, medicaments and biological substances
    Header
  141. T50.991
    Poisoning by other drugs, medicaments and biological substances, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  142. T50.992
    Poisoning by other drugs, medicaments and biological substances, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  143. T50.993
    Poisoning by other drugs, medicaments and biological substances, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  144. T50.994
    Poisoning by other drugs, medicaments and biological substances, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  145. T50.995
    Adverse effect of other drugs, medicaments and biological substances +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  146. T50.996
    Underdosing of other drugs, medicaments and biological substances +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

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 T50 defined here

The appropriate 7th character is to be added to each code from category T50

7th characters for T50
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