DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Block · Chapter 20

Y90-Y99 Supplementary factors related to causes of morbidity classified elsewhere (Y90-Y99)

Block Y90-Y99 groups 5 categories with 334 billable codes in FY2027.

Where it sits

  1. Chapter 20 External causes of morbidity (V00-Y99)
  2. Y90-Y99 Supplementary factors related to causes of morbidity classified elsewhere (Y90-Y99)

Neighbouring blocks

Categories
5
Billable codes
334
CC codes
0
MCC codes
0
HCC V28 codes
0
New FY2027
0

Categories in Y90-Y99

  • Y90

    Evidence of alcohol involvement determined by blood alcohol level

    –

    • 10 billable codes
  • Y92

    Place of occurrence of the external cause

    –

    • 209 billable codes
  • Y93

    Activity codes

    –

    • 109 billable codes
  • Y95

    Nosocomial condition

    –

    • Billable, no subdivisions
  • Y99

    External cause status

    –

    • 5 billable codes

Block instructions

Notes

  • These categories may be used to provide supplementary information concerning causes of morbidity. They are not to be used for single-condition coding.

Notes that also apply

Chapter 20 instructions (Notes 1): printed on the chapter 20 page.