DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

T75 Other and unspecified effects of other external causes

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

T75 is not billable. The category heads 48 billable codes in FY2027, grouped under 6 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.

Index → code

Where it sits

  1. Chapter 19 Injury, poisoning and certain other consequences of external causes (S00-T88)
  2. T66-T78 Other and unspecified effects of external causes (T66-T78)
  3. T75 Other and unspecified effects of other external causes
Billable codes
48
Subdivisions
6
CC / MCC codes
1 / 0
HCC V28 codes
0
New FY2027
0
Index entries
72

Codes in T75

  1. T75.0
    Effects of lightning
    Header
    Inclusion terms 1

    Inclusion terms

    • Struck by lightning
  2. T75.00
    Unspecified effects of lightning +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Struck by lightning NOS
  3. T75.01
    Shock due to being struck by lightning +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  4. T75.09
    Other effects of lightning +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Use additional code 1

    Use additional code

    • code for other effects of lightning
  5. T75.1
    Unspecified effects of drowning and nonfatal submersion +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
    Inclusion terms 1, Excludes1 1

    Inclusion terms

    • Immersion

    Excludes1

    • specified effects of drowning- code to effects
  6. T75.2
    Effects of vibration
    Header
  7. T75.20
    Unspecified effects of vibration +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  8. T75.21
    Pneumatic hammer syndrome +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  9. T75.22
    Traumatic vasospastic syndrome +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  10. T75.23
    Vertigo from infrasound +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Excludes1 1

    Excludes1

    • vertigo NOS (R42) R42
  11. T75.29
    Other effects of vibration +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  12. T75.3
    Motion sickness +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 3, Use additional code 1

    Inclusion terms

    • Airsickness
    • Seasickness
    • Travel sickness

    Use additional code

    • external cause code to identify vehicle or type of motion (Y92.81-) Y92.81
  13. T75.4
    Electrocution +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 2

    Inclusion terms

    • Shock from electric current
    • Shock from electroshock gun (taser)
  14. T75.8
    Other specified effects of external causes
    Header
  15. T75.81
    Effects of abnormal gravitation [G] forces +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  16. T75.82
    Effects of weightlessness +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  17. T75.83
    Effects of war theater
    Header
    Use additional code 1

    Use additional code

    • code to identify associated manifestations
  18. T75.830
    Gulf war illness +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Gulf war syndrome
  19. T75.838
    Effects of other war theater +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  20. T75.89
    Other specified effects of external causes +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

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 T75

Excludes1

  • adverse effects NEC (T78.-) T78

Excludes2

  • burns (electric) (T20-T31) T20 T31

Notes that also apply

Block T66-T78 instructions (Code also 6): 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 T75 defined here

The appropriate 7th character is to be added to each code from category T75

7th characters for T75
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

  • Lightning (effects) (stroke) (struck by) → T75.00
  • Keraunoparalysis → T75.09
  • Bathing cramp → T75.1
  • Drowned, drowning (near) → T75.1
  • Immersion → T75.1
  • Near drowning → T75.1
  • Submersion (fatal) (nonfatal) → T75.1
  • Pneumatic hammer (drill) syndrome → T75.21
  • Airplane sickness → T75.3
  • Car sickness → T75.3
  • Mal de mer → T75.3
  • Motion sickness (from travel, any vehicle) (from roundabouts or swings) → T75.3
  • Seasickness → T75.3
  • Train sickness → T75.3
  • Electric current, electricity, effects (concussion) (fatal) (nonfatal) (shock) → T75.4
  • Electrocution → T75.4
  • Weightlessness (effect of) → T75.82
  • Exposure (to) → T75.89
  • Lightning (effects) (stroke) (struck by)shock → T75.01
  • Shocklightning → T75.01
  • Lightning (effects) (stroke) (struck by)specified effect NEC → T75.09
  • Asphyxia, asphyxiation (by)drowning → T75.1
  • Asphyxia, asphyxiation (by)submersion → T75.1
  • Cramp(s)bathing → T75.1
  • Cramp(s)due to immersion → T75.1
  • Cramp(s)immersion → T75.1
  • Cramp(s)swimmer's → T75.1
  • Effect, adversesubmersion → T75.1
  • Swimmer'scramp → T75.1
  • Vibrationadverse effects → T75.20
  • Disease, diseasedpneumatic drill (hammer) → T75.21
  • Syndromepneumatic hammer → T75.21
  • Syndrometraumatic vasospastic → T75.22
  • Syndromevasospastic (traumatic) → T75.22
  • Vertigodue to infrasound → T75.23
  • Vertigoinfrasound → T75.23
  • Vibrationvertigo → T75.23
  • Airsickness → T75.3
  • Effect, adversemotion → T75.3
  • Nausea (without vomiting)marina → T75.3

32 more, longer entries are not listed; the search box finds them by word.

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

Hierarchy