DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

T48 Poisoning by, adverse effect of and underdosing of agents primarily acting on smooth and skeletal muscles and the respiratory system

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

T48 is not billable. The category heads 180 billable codes in FY2027, grouped under 8 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. T48 Poisoning by, adverse effect of and underdosing of agents primarily acting on smooth and skeletal muscles and the respiratory system
Billable codes
180
Subdivisions
8
CC / MCC codes
0 / 0
HCC V28 codes
10
New FY2027
0
Index entries
0

Codes in T48

  1. T48.0
    Poisoning by, adverse effect of and underdosing of oxytocic drugs
    Header
    Excludes1 1

    Excludes1

    • poisoning by, adverse effect of and underdosing of estrogens, progestogens and antagonists (T38.4-T38.6) T38.4 T38.6
  2. T48.0X
    Poisoning by, adverse effect of and underdosing of oxytocic drugs
    Header
  3. T48.0X1
    Poisoning by oxytocic drugs, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by oxytocic drugs NOS
  4. T48.0X2
    Poisoning by oxytocic drugs, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  5. T48.0X3
    Poisoning by oxytocic drugs, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  6. T48.0X4
    Poisoning by oxytocic drugs, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  7. T48.0X5
    Adverse effect of oxytocic drugs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  8. T48.0X6
    Underdosing of oxytocic drugs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  9. T48.1
    Poisoning by, adverse effect of and underdosing of skeletal muscle relaxants [neuromuscular blocking agents]
    Header
  10. T48.1X
    Poisoning by, adverse effect of and underdosing of skeletal muscle relaxants [neuromuscular blocking agents]
    Header
  11. T48.1X1
    Poisoning by skeletal muscle relaxants [neuromuscular blocking agents], accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by skeletal muscle relaxants [neuromuscular blocking agents] NOS
  12. T48.1X2
    Poisoning by skeletal muscle relaxants [neuromuscular blocking agents], intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  13. T48.1X3
    Poisoning by skeletal muscle relaxants [neuromuscular blocking agents], assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  14. T48.1X4
    Poisoning by skeletal muscle relaxants [neuromuscular blocking agents], undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  15. T48.1X5
    Adverse effect of skeletal muscle relaxants [neuromuscular blocking agents] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  16. T48.1X6
    Underdosing of skeletal muscle relaxants [neuromuscular blocking agents] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  17. T48.2
    Poisoning by, adverse effect of and underdosing of other and unspecified drugs acting on muscles
    Header
  18. T48.20
    Poisoning by, adverse effect of and underdosing of unspecified drugs acting on muscles
    Header
  19. T48.201
    Poisoning by unspecified drugs acting on muscles, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by unspecified drugs acting on muscles NOS
  20. T48.202
    Poisoning by unspecified drugs acting on muscles, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  21. T48.203
    Poisoning by unspecified drugs acting on muscles, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  22. T48.204
    Poisoning by unspecified drugs acting on muscles, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  23. T48.205
    Adverse effect of unspecified drugs acting on muscles +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  24. T48.206
    Underdosing of unspecified drugs acting on muscles +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  25. T48.29
    Poisoning by, adverse effect of and underdosing of other drugs acting on muscles
    Header
  26. T48.291
    Poisoning by other drugs acting on muscles, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by other drugs acting on muscles NOS
  27. T48.292
    Poisoning by other drugs acting on muscles, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  28. T48.293
    Poisoning by other drugs acting on muscles, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  29. T48.294
    Poisoning by other drugs acting on muscles, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  30. T48.295
    Adverse effect of other drugs acting on muscles +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  31. T48.296
    Underdosing of other drugs acting on muscles +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  32. T48.3
    Poisoning by, adverse effect of and underdosing of antitussives
    Header
  33. T48.3X
    Poisoning by, adverse effect of and underdosing of antitussives
    Header
  34. T48.3X1
    Poisoning by antitussives, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by antitussives NOS
  35. T48.3X2
    Poisoning by antitussives, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  36. T48.3X3
    Poisoning by antitussives, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  37. T48.3X4
    Poisoning by antitussives, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  38. T48.3X5
    Adverse effect of antitussives +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  39. T48.3X6
    Underdosing of antitussives +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  40. T48.4
    Poisoning by, adverse effect of and underdosing of expectorants
    Header
  41. T48.4X
    Poisoning by, adverse effect of and underdosing of expectorants
    Header
  42. T48.4X1
    Poisoning by expectorants, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by expectorants NOS
  43. T48.4X2
    Poisoning by expectorants, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  44. T48.4X3
    Poisoning by expectorants, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  45. T48.4X4
    Poisoning by expectorants, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  46. T48.4X5
    Adverse effect of expectorants +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  47. T48.4X6
    Underdosing of expectorants +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  48. T48.5
    Poisoning by, adverse effect of and underdosing of other anti-common-cold drugs
    Header
    Inclusion terms 1, Excludes2 3

    Inclusion terms

    • Poisoning by, adverse effect of and underdosing of decongestants

    Excludes2

    • poisoning by, adverse effect of and underdosing of antipyretics, NEC (T39.9-) T39.9
    • poisoning by, adverse effect of and underdosing of non-steroidal antiinflammatory drugs (T39.3-) T39.3
    • poisoning by, adverse effect of and underdosing of salicylates (T39.0-) T39.0
  49. T48.5X
    Poisoning by, adverse effect of and underdosing of other anti-common-cold drugs
    Header
  50. T48.5X1
    Poisoning by other anti-common-cold drugs, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by other anti-common-cold drugs NOS
  51. T48.5X2
    Poisoning by other anti-common-cold drugs, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  52. T48.5X3
    Poisoning by other anti-common-cold drugs, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  53. T48.5X4
    Poisoning by other anti-common-cold drugs, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  54. T48.5X5
    Adverse effect of other anti-common-cold drugs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  55. T48.5X6
    Underdosing of other anti-common-cold drugs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  56. T48.6
    Poisoning by, adverse effect of and underdosing of antiasthmatics, not elsewhere classified
    Header
    Inclusion terms 1, Excludes1 2

    Inclusion terms

    • Poisoning by, adverse effect of and underdosing of beta-adrenoreceptor agonists used in asthma therapy

    Excludes1

    • poisoning by, adverse effect of and underdosing of beta-adrenoreceptor agonists not used in asthma therapy (T44.5) T44.5
    • poisoning by, adverse effect of and underdosing of anterior pituitary [adenohypophyseal] hormones (T38.8) T38.8
  57. T48.6X
    Poisoning by, adverse effect of and underdosing of antiasthmatics
    Header
  58. T48.6X1
    Poisoning by antiasthmatics, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Poisoning by antiasthmatics NOS
  59. T48.6X2
    Poisoning by antiasthmatics, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  60. T48.6X3
    Poisoning by antiasthmatics, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  61. T48.6X4
    Poisoning by antiasthmatics, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  62. T48.6X5
    Adverse effect of antiasthmatics +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  63. T48.6X6
    Underdosing of antiasthmatics +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  64. T48.9
    Poisoning by, adverse effect of and underdosing of other and unspecified agents primarily acting on the respiratory system
    Header
  65. T48.90
    Poisoning by, adverse effect of and underdosing of unspecified agents primarily acting on the respiratory system
    Header
  66. T48.901
    Poisoning by unspecified agents primarily acting on the respiratory system, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  67. T48.902
    Poisoning by unspecified agents primarily acting on the respiratory system, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  68. T48.903
    Poisoning by unspecified agents primarily acting on the respiratory system, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  69. T48.904
    Poisoning by unspecified agents primarily acting on the respiratory system, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  70. T48.905
    Adverse effect of unspecified agents primarily acting on the respiratory system +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  71. T48.906
    Underdosing of unspecified agents primarily acting on the respiratory system +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  72. T48.99
    Poisoning by, adverse effect of and underdosing of other agents primarily acting on the respiratory system
    Header
  73. T48.991
    Poisoning by other agents primarily acting on the respiratory system, accidental (unintentional) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  74. T48.992
    Poisoning by other agents primarily acting on the respiratory system, intentional self-harm +7th: A D S
    Needs 7th character155 (some 7th characters)Exempt: 2 of 3 7th characters
  75. T48.993
    Poisoning by other agents primarily acting on the respiratory system, assault +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  76. T48.994
    Poisoning by other agents primarily acting on the respiratory system, undetermined +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  77. T48.995
    Adverse effect of other agents primarily acting on the respiratory system +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  78. T48.996
    Underdosing of other agents primarily acting on the respiratory 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

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 T48 defined here

The appropriate 7th character is to be added to each code from category T48

7th characters for T48
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