DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

T38 Poisoning by, adverse effect of and underdosing of hormones and their synthetic substitutes and antagonists, not elsewhere classified

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

T38 is not billable. The category heads 234 billable codes in FY2027, grouped under 10 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.

Index → code

  • Reactioninsulin → T38.3-
  • Hyperinsulinism (functional)therapeutic misadventure (from administration of insulin) → T38.3
  • Misadventure (of) (prophylactic) (therapeutic)administration of insulin (by accident) → T38.3

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. T38 Poisoning by, adverse effect of and underdosing of hormones and their synthetic substitutes and antagonists, not elsewhere classified
Billable codes
234
Subdivisions
10
CC / MCC codes
0 / 0
HCC V28 codes
13
New FY2027
0
Index entries
6

Codes in T38

  1. T38.0
    Poisoning by, adverse effect of and underdosing of glucocorticoids and synthetic analogues
    Header
    Excludes1 1

    Excludes1

    • glucocorticoids, topically used (T49.-) T49
  2. T38.0X
    Poisoning by, adverse effect of and underdosing of glucocorticoids and synthetic analogues
    Header
  3. T38.0X1
    Poisoning by glucocorticoids and synthetic analogues, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by glucocorticoids and synthetic analogues NOS
  4. T38.0X2
    Poisoning by glucocorticoids and synthetic analogues, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  5. T38.0X3
    Poisoning by glucocorticoids and synthetic analogues, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  6. T38.0X4
    Poisoning by glucocorticoids and synthetic analogues, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  7. T38.0X5
    Adverse effect of glucocorticoids and synthetic analogues +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  8. T38.0X6
    Underdosing of glucocorticoids and synthetic analogues +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  9. T38.1
    Poisoning by, adverse effect of and underdosing of thyroid hormones and substitutes
    Header
  10. T38.1X
    Poisoning by, adverse effect of and underdosing of thyroid hormones and substitutes
    Header
  11. T38.1X1
    Poisoning by thyroid hormones and substitutes, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by thyroid hormones and substitutes NOS
  12. T38.1X2
    Poisoning by thyroid hormones and substitutes, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  13. T38.1X3
    Poisoning by thyroid hormones and substitutes, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  14. T38.1X4
    Poisoning by thyroid hormones and substitutes, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  15. T38.1X5
    Adverse effect of thyroid hormones and substitutes +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  16. T38.1X6
    Underdosing of thyroid hormones and substitutes +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  17. T38.2
    Poisoning by, adverse effect of and underdosing of antithyroid drugs
    Header
  18. T38.2X
    Poisoning by, adverse effect of and underdosing of antithyroid drugs
    Header
  19. T38.2X1
    Poisoning by antithyroid drugs, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by antithyroid drugs NOS
  20. T38.2X2
    Poisoning by antithyroid drugs, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  21. T38.2X3
    Poisoning by antithyroid drugs, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  22. T38.2X4
    Poisoning by antithyroid drugs, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  23. T38.2X5
    Adverse effect of antithyroid drugs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  24. T38.2X6
    Underdosing of antithyroid drugs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  25. T38.3
    Poisoning by, adverse effect of and underdosing of insulin and oral hypoglycemic [antidiabetic] drugs
    Header
  26. T38.3X
    Poisoning by, adverse effect of and underdosing of insulin and oral hypoglycemic [antidiabetic] drugs
    Header
  27. T38.3X1
    Poisoning by insulin and oral hypoglycemic [antidiabetic] drugs, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by insulin and oral hypoglycemic [antidiabetic] drugs NOS
  28. T38.3X2
    Poisoning by insulin and oral hypoglycemic [antidiabetic] drugs, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  29. T38.3X3
    Poisoning by insulin and oral hypoglycemic [antidiabetic] drugs, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  30. T38.3X4
    Poisoning by insulin and oral hypoglycemic [antidiabetic] drugs, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  31. T38.3X5
    Adverse effect of insulin and oral hypoglycemic [antidiabetic] drugs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  32. T38.3X6
    Underdosing of insulin and oral hypoglycemic [antidiabetic] drugs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  33. T38.4
    Poisoning by, adverse effect of and underdosing of oral contraceptives
    Header
    Inclusion terms 1

    Inclusion terms

    • Poisoning by, adverse effect of and underdosing of multiple- and single-ingredient oral contraceptive preparations
  34. T38.4X
    Poisoning by, adverse effect of and underdosing of oral contraceptives
    Header
  35. T38.4X1
    Poisoning by oral contraceptives, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by oral contraceptives NOS
  36. T38.4X2
    Poisoning by oral contraceptives, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  37. T38.4X3
    Poisoning by oral contraceptives, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  38. T38.4X4
    Poisoning by oral contraceptives, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  39. T38.4X5
    Adverse effect of oral contraceptives +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  40. T38.4X6
    Underdosing of oral contraceptives +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  41. T38.5
    Poisoning by, adverse effect of and underdosing of other estrogens and progestogens
    Header
    Inclusion terms 1

    Inclusion terms

    • Poisoning by, adverse effect of and underdosing of estrogens and progestogens mixtures and substitutes
  42. T38.5X
    Poisoning by, adverse effect of and underdosing of other estrogens and progestogens
    Header
  43. T38.5X1
    Poisoning by other estrogens and progestogens, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by other estrogens and progestogens NOS
  44. T38.5X2
    Poisoning by other estrogens and progestogens, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  45. T38.5X3
    Poisoning by other estrogens and progestogens, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  46. T38.5X4
    Poisoning by other estrogens and progestogens, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  47. T38.5X5
    Adverse effect of other estrogens and progestogens +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  48. T38.5X6
    Underdosing of other estrogens and progestogens +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  49. T38.6
    Poisoning by, adverse effect of and underdosing of antigonadotrophins, antiestrogens, antiandrogens, not elsewhere classified
    Header
    Inclusion terms 1

    Inclusion terms

    • Poisoning by, adverse effect of and underdosing of tamoxifen
  50. T38.6X
    Poisoning by, adverse effect of and underdosing of antigonadotrophins, antiestrogens, antiandrogens, not elsewhere classified
    Header
  51. T38.6X1
    Poisoning by antigonadotrophins, antiestrogens, antiandrogens, not elsewhere classified, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by antigonadotrophins, antiestrogens, antiandrogens, not elsewhere classified NOS
  52. T38.6X2
    Poisoning by antigonadotrophins, antiestrogens, antiandrogens, not elsewhere classified, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  53. T38.6X3
    Poisoning by antigonadotrophins, antiestrogens, antiandrogens, not elsewhere classified, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  54. T38.6X4
    Poisoning by antigonadotrophins, antiestrogens, antiandrogens, not elsewhere classified, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  55. T38.6X5
    Adverse effect of antigonadotrophins, antiestrogens, antiandrogens, not elsewhere classified +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  56. T38.6X6
    Underdosing of antigonadotrophins, antiestrogens, antiandrogens, not elsewhere classified +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  57. T38.7
    Poisoning by, adverse effect of and underdosing of androgens and anabolic congeners
    Header
  58. T38.7X
    Poisoning by, adverse effect of and underdosing of androgens and anabolic congeners
    Header
  59. T38.7X1
    Poisoning by androgens and anabolic congeners, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by androgens and anabolic congeners NOS
  60. T38.7X2
    Poisoning by androgens and anabolic congeners, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  61. T38.7X3
    Poisoning by androgens and anabolic congeners, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  62. T38.7X4
    Poisoning by androgens and anabolic congeners, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  63. T38.7X5
    Adverse effect of androgens and anabolic congeners +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  64. T38.7X6
    Underdosing of androgens and anabolic congeners +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  65. T38.8
    Poisoning by, adverse effect of and underdosing of other and unspecified hormones and synthetic substitutes
    Header
  66. T38.80
    Poisoning by, adverse effect of and underdosing of unspecified hormones and synthetic substitutes
    Header
  67. T38.801
    Poisoning by unspecified hormones and synthetic substitutes, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by unspecified hormones and synthetic substitutes NOS
  68. T38.802
    Poisoning by unspecified hormones and synthetic substitutes, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  69. T38.803
    Poisoning by unspecified hormones and synthetic substitutes, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  70. T38.804
    Poisoning by unspecified hormones and synthetic substitutes, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  71. T38.805
    Adverse effect of unspecified hormones and synthetic substitutes +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  72. T38.806
    Underdosing of unspecified hormones and synthetic substitutes +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  73. T38.81
    Poisoning by, adverse effect of and underdosing of anterior pituitary [adenohypophyseal] hormones
    Header
  74. T38.811
    Poisoning by anterior pituitary [adenohypophyseal] hormones, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by anterior pituitary [adenohypophyseal] hormones NOS
  75. T38.812
    Poisoning by anterior pituitary [adenohypophyseal] hormones, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  76. T38.813
    Poisoning by anterior pituitary [adenohypophyseal] hormones, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  77. T38.814
    Poisoning by anterior pituitary [adenohypophyseal] hormones, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  78. T38.815
    Adverse effect of anterior pituitary [adenohypophyseal] hormones +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  79. T38.816
    Underdosing of anterior pituitary [adenohypophyseal] hormones +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  80. T38.89
    Poisoning by, adverse effect of and underdosing of other hormones and synthetic substitutes
    Header
  81. T38.891
    Poisoning by other hormones and synthetic substitutes, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by other hormones and synthetic substitutes NOS
  82. T38.892
    Poisoning by other hormones and synthetic substitutes, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  83. T38.893
    Poisoning by other hormones and synthetic substitutes, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  84. T38.894
    Poisoning by other hormones and synthetic substitutes, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  85. T38.895
    Adverse effect of other hormones and synthetic substitutes +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  86. T38.896
    Underdosing of other hormones and synthetic substitutes +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  87. T38.9
    Poisoning by, adverse effect of and underdosing of other and unspecified hormone antagonists
    Header
  88. T38.90
    Poisoning by, adverse effect of and underdosing of unspecified hormone antagonists
    Header
  89. T38.901
    Poisoning by unspecified hormone antagonists, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by unspecified hormone antagonists NOS
  90. T38.902
    Poisoning by unspecified hormone antagonists, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  91. T38.903
    Poisoning by unspecified hormone antagonists, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  92. T38.904
    Poisoning by unspecified hormone antagonists, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  93. T38.905
    Adverse effect of unspecified hormone antagonists +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  94. T38.906
    Underdosing of unspecified hormone antagonists +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  95. T38.99
    Poisoning by, adverse effect of and underdosing of other hormone antagonists
    Header
  96. T38.991
    Poisoning by other hormone antagonists, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by other hormone antagonists NOS
  97. T38.992
    Poisoning by other hormone antagonists, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  98. T38.993
    Poisoning by other hormone antagonists, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  99. T38.994
    Poisoning by other hormone antagonists, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  100. T38.995
    Adverse effect of other hormone antagonists +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  101. T38.996
    Underdosing of other hormone antagonists +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 T38

Excludes1

  • mineralocorticoids and their antagonists (T50.0-) T50.0
  • oxytocic hormones (T48.0-) T48.0
  • parathyroid hormones and derivatives (T50.9-) T50.9

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 T38 defined here

The appropriate 7th character is to be added to each code from category T38

7th characters for T38
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.

Index entries

  • Hyperinsulinism (functional)therapeutic misadventure (from administration of insulin) → T38.3
  • Misadventure (of) (prophylactic) (therapeutic)administration of insulin (by accident) → T38.3
  • Reactioninsulin → T38.3-
  • Hypoglycemia (spontaneous)due to insulintherapeutic misadventure → T38.3
  • Reactionhypoglycemic, due to insulintherapeutic misadventure → T38.3
  • Shockinsulintherapeutic misadventure → T38.3

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy