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ICD-10-CM 2027 diagnosis code

Y64Contaminated medical or biological substances

Not billable — use a more specific code

Y64 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Y64

Y64 is the ICD-10-CM diagnosis code for contaminated medical or biological substances. It belongs to block Y62-Y69 (misadventures to patients during surgical and medical care) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: Y64.0 (infused), Y64.1 (immunization), Y64.8 (means) and Y64.9 (means).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under Y64

Notes that apply from higher levels

Instructions written at a parent level also apply to Y64.

Broader instructions also apply from Y62-Y69 Misadventures to patients during surgical and medical care and Chapter 20: External causes of morbidity.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about Y64

Is Y64 billable?

No. Y64 is a header code. Report one of its more specific subcodes instead.